Psychiatric Billing Services: The Complete Guide for 2026

Psychiatric billing is not therapy billing. It operates in a different lane — one that combines prescribing authority, E/M coding, medication management, psychotherapy add-ons, procedural billing for ECT and TMS, and inpatient facility claims under a single provider type. That makes it one of the most complex billing specialties in healthcare.

Psychiatric billing services cover the full revenue cycle for psychiatrists, psychiatric nurse practitioners (PMHNPs), and physician assistants working in mental health. This includes diagnostic evaluations using CPT 90792, E/M visits coded under 99213–99215, pharmacological management via 90863, psychotherapy add-on codes like +90833 and +90836, and procedures such as electroconvulsive therapy (90870) and transcranial magnetic stimulation (90867–90869) — all routed through payer systems that frequently carve out behavioral health to separate administrators like Optum, Carelon, or Magellan.

Psychiatric billing is a specialized form of medical billing for diagnosing and managing mental health disorders. Unlike therapy-only billing, it includes E/M codes, medication management, 90792 evaluations, and procedures like ECT or TMS, while also supporting psychotherapy add-on codes and payer-specific medical or behavioral health routing.

Revenue cycle data shows behavioral health denial rates can reach 15–25%, with psychiatric E/M and medication-management denials commonly reported around 12–18%. For a practice collecting $1 million annually, a 20% denial rate puts roughly $200,000 at risk every year.

This guide covers all of it — codes, PMHNP billing rules, claim submission workflows, software options, inpatient billing, and the real math behind outsourcing decisions.

What Is Psychiatric Billing? How It Differs from General Mental Health Billing

Psychiatric billing is a hybrid discipline. It combines medical billing, behavioral health coding, and mental health revenue cycle management into a single workflow that most therapy-only billing systems can’t handle.

Core Definition

At its foundation, psychiatric billing covers claim submission and reimbursement for services provided by prescribing mental health providers — psychiatrists (MD/DO), psychiatric nurse practitioners (PMHNP-BC), and physician assistants with psychiatric specialization. These providers can bill E/M codes, medication management, diagnostic evaluations with medical services, and somatic procedures. That’s a fundamentally different coding universe than what an LCSW or LPC operates in.

How It Differs from Therapy-Only Billing

The distinction isn’t just terminology. It’s operational.

Therapy-only billing relies primarily on psychotherapy CPT codes — 90832, 90834, 90837 for individual sessions, plus 90846/90847 for family therapy and 90853 for group. The diagnostic evaluation code is 90791 (without medical services). The claim goes to the behavioral health benefit, and that’s it.

Psychiatric billing adds an entire second layer. A psychiatrist evaluating a new patient uses CPT 90792 — psychiatric diagnostic evaluation with medical services — because they’re assessing medication options, reviewing lab values, and making prescribing decisions. Follow-up visits are billed under E/M codes (99213, 99214, 99215) based on medical decision making. When therapy is provided in the same visit, add-on codes (+90833, +90836, +90838) are layered on top with modifier -25 on the E/M code.

That dual-coding triage — deciding whether a visit is E/M only, therapy only, or a combination — is where most billing errors happen. And it’s where most denial management work starts.

Services Covered Under Psychiatric Billing

The scope goes well beyond talk therapy:

• Psychiatric diagnostic evaluations (90791, 90792)
• E/M visits for medication management (99213–99215)
• Pharmacological management (90863)
• Psychotherapy — standalone and add-on codes
• Electroconvulsive therapy (ECT — 90870)
• Transcranial magnetic stimulation (TMS — 90867, 90868, 90869)
• Inpatient psychiatric professional services
• Group therapy (90853) and family therapy (90846, 90847)
• Behavioral Health Integration (G0323) and Collaborative Care (99492)
• Psychological testing coordination

The Psychiatric Revenue Cycle

The psychiatric revenue cycle follows the same general stages as medical billing — eligibility verification using EDI 270/271 transactions, prior authorization, clinical documentation, coding and charge entry, claim submission via ANSI 837P, payment posting from ERA 835 remittances, and AR follow-up.

But the failure points are different. Before the first claim goes out, you need to know whether behavioral health benefits are carved out to a third-party MBHO. If Optum manages the psychiatric benefit but you submit to BCBS, that claim comes back as CO-109 — wrong payer. That’s not a coding error. It’s a workflow error that happens before coding even starts.

For a foundational overview of what mental health billing covers and the broader behavioral health billing framework, we’ve published separate guides.

Feature	Psychiatric Billing	Therapy-Only Billing
Core Service	Medical management + therapy	Talk therapy and counseling
Primary Clinicians	Psychiatrists, PMHNPs, PAs	LCSWs, LPCs, LMFTs, psychologists
Key CPT Codes	90792, 99202–99215, 90863, ECT/TMS	90791, 90832–90838, 90846–90853
Medication Management	Included through E/M or 90863	Not allowed
Diagnostic Evaluation	90792 with medical services	90791 without medical services
Combination Billing	E/M + psychotherapy add-on + modifier -25	Psychotherapy + crisis or interactive complexity
Procedures	ECT (90870), TMS (90867–90869)	Generally not applicable
Claim Routing	May split between medical and BH carve-out	Usually behavioral health benefit only
Top Denial Driver	Medical necessity of E/M level + medication management NCCI conflicts	Session limits, ongoing therapy necessity

Psychiatric Billing Codes — Complete 2026 Reference

This is where claims live or die. Every code has a time rule, a documentation requirement, and at least one denial trigger that catches practices off guard.

Psychiatric Evaluation Codes: 90791 vs 90792

CPT 90791 is a psychiatric diagnostic evaluation without medical services. Any qualified mental health provider can bill it — psychiatrists, psychologists, LCSWs, PMHNPs.

CPT 90792 is a psychiatric diagnostic evaluation with medical services. Only prescribers can bill this code. It requires a medical component — medication assessment, lab review, physical health considerations alongside the psychiatric evaluation. A PMHNP in a full practice authority state can bill 90792. An LCSW cannot.

Both codes are limited to one per client, per provider or group (same billing NPI), per calendar year under most payer policies. CMS Article A57480 considers an extended break approximately 6 months from the last visit. You cannot bill 90791 or 90792 on the same day as psychotherapy codes without specific payer approval.

E/M Codes for Psychiatry (99202–99215)

Follow-up psychiatric visits — medication checks, treatment adjustments, symptom monitoring — are billed using standard E/M codes. Code selection is based on medical decision making (MDM), not time, when psychotherapy add-ons are also billed.

• 99213 — low MDM (stable medication, routine follow-up)
• 99214 — moderate MDM (medication change, new symptom evaluation)
• 99215 — high MDM (complex polypharmacy, safety concerns, SI/HI risk)

Medication Management (90863)

CPT 90863 — pharmacological management — is a code specifically for medication oversight. Here’s the critical NCCI restriction most practices miss:

In accordance with the National Correct Coding Initiative (NCCI), medication management (90863) and an E/M or psychotherapy service cannot be billed on the same day of service by the same provider.

This means if the visit focus extends beyond brief medication management into broader clinical discussion, the service is considered psychotherapy or E/M — not medication management. The WA State billing guide states explicitly: “If the client continues to experience signs and symptoms that require discussion beyond minimal psychotherapy, the focus of the service is broader and is considered psychotherapy rather than medication management.”

Psychotherapy Add-On Codes (+90833, +90836, +90838)

When a psychiatrist provides both E/M services and psychotherapy in the same visit:

• +90833 — psychotherapy add-on, 16–37 minutes
• +90836 — psychotherapy add-on, 38–52 minutes
• +90838 — psychotherapy add-on, 53+ minutes

These codes are never billed standalone. They require an E/M base code with modifier -25 on the E/M to indicate a significant, separately identifiable service. The E/M portion is selected by MDM. Time spent on E/M activities is not included in psychotherapy time — there must be no overlap.

Electroconvulsive Therapy (90870)

CPT 90870 covers ECT — limited to one treatment per client per day, billed by psychiatrists only. ECT requires prior authorization from most payers. In facility settings, the hospital bills the facility component on UB-04 while the psychiatrist bills the professional component on CMS-1500.

Transcranial Magnetic Stimulation (90867–90869)

• 90867 — TMS treatment plan development (1 per client per year)
• 90868 — TMS delivery session (up to 60 sessions)
• 90869 — TMS treatment redetermination (1 per client per year)

TMS is outpatient only. Prior authorization is required by virtually every payer. For medical coding accuracy, each session must document the treatment parameters and clinical response.

Documentation Requirements

According to the WA State Mental Health Services Billing Guide, medication management documentation requires 12 specific elements:

1. Date and time of service
2. Diagnosis (updated annually)
3. Interim medication history
4. Current symptoms and problems, including physical symptoms
5. Problems, reactions, and side effects to medications or ECT
6. Current mental status exam
7. Any medication modifications
8. Reasons for medication adjustments, changes, or continuation
9. Desired therapeutic drug levels (if applicable)
10. Current laboratory values (if applicable)
11. Anticipated physical and behavioral outcomes
12. Provider signature

Missing any of these elements in a medication management visit creates a CO-50 (medical necessity) denial risk during audit.

Code	Category	Description	Time Rule	Key Billing Rule
90791	Evaluation	Diagnostic eval (no medical)	Untimed	No same-day psychotherapy; 1/client/year
90792	Evaluation	Diagnostic eval + medical	Untimed	Prescriber only; 1/client/year
99213–99215	E/M	Medication management visits	MDM-based	Use MDM when paired with psychotherapy
90832	Psychotherapy	30-min therapy	16–37 min	Time must be documented
90834	Psychotherapy	45-min therapy	38–52 min	Cannot overlap with E/M time
90837	Psychotherapy	60-min therapy	53+ min	Requires start/stop times
+90833	Add-on	Therapy with E/M	≥16 min	Requires E/M + modifier -25
+90836	Add-on	Therapy with E/M	≥38 min	Requires E/M + modifier -25
+90838	Add-on	Therapy with E/M	≥53 min	Requires E/M + modifier -25
90863	Medication	Pharmacologic mgmt	≥16 min	NOT with E/M same day (NCCI)
90839	Crisis	Crisis therapy initial	30–74 min	Cannot combine with other psychotherapy
90853	Group	Group therapy	~50 min	Cannot bundle with individual
90870	Procedure	ECT	N/A	1 per client/day; facility + professional split
90867–69	Procedure	TMS sessions	15–30+ min	Prior auth required; outpatient only
90785	Add-on	Interactive complexity	N/A	Requires base psychotherapy or eval code

For a complete breakdown of mental health CPT codes and billing codes across all provider types, see our dedicated reference guides.

Psychiatric Nurse Practitioner Billing Codes

This is one of the most searched and least well-answered topics in psychiatric billing. PMHNPs represent a growing share of psychiatric providers, but billing rules vary significantly by state, payer, and supervision model.

Which Codes Can a PMHNP Bill?

Psychiatric nurse practitioners (PMHNP-BC) can bill most psychiatric CPT codes when their state scope of practice and payer contracts allow:

• 90791 — psychiatric diagnostic evaluation
• 90792 — psychiatric diagnostic evaluation with medical services (requires prescribing authority)
• 90832–90837 — standalone psychotherapy
• +90833, +90836, +90838 — psychotherapy add-ons with E/M
• 99202–99215 — evaluation and management codes
• 90863 — pharmacological management (same NCCI restrictions apply)
• 96127 — brief emotional/behavioral assessment

The key question is whether the PMHNP has prescribing authority in their state. CPT 90792 requires medical services — if your state restricts PMHNP prescribing or requires a collaborative practice agreement (CPA), that affects whether 90792 can be billed independently.

Independent Billing vs Incident-to

Independent (direct) billing: The PMHNP bills under their own NPI using taxonomy code 363LP0808X. Medicare reimburses at 85% of the Physician Fee Schedule (MPFS). The PMHNP must be enrolled in PECOS using CMS Form 855I.

Incident-to billing: The PMHNP bills under a supervising psychiatrist’s NPI. Reimbursement jumps to 100% MPFS — but only when all CMS incident-to requirements are met: the physician must establish the treatment plan, the physician must be immediately available (on-site or virtual per 2026 rules), and the service must continue an established plan of care.

The 15% reimbursement differential matters. For a PMHNP seeing 20 patients per week, the annual revenue difference between 85% and 100% reimbursement is roughly $18,000–$25,000 per year.

Taxonomy and Credentialing

Taxonomy code 363LP0808X identifies a Psychiatric-Mental Health Nurse Practitioner. Using the wrong taxonomy code — like the general NP code 363L00000X — can trigger CO-B7 credentialing denials. The taxonomy code must match across NPI registration, PECOS enrollment, CAQH profiles, and individual payer credentialing.

ANCC PMHNP-BC board certification is required for most payer panels and Medicare enrollment. For detailed guidance on credentialing for mental health providers, we’ve published a separate guide.

Common PMHNP Billing Mistakes

• Billing 90792 without prescribing authority in a restricted practice state
• Using general NP taxonomy instead of 363LP0808X
• Submitting claims before credentialing effective date → CO-B7 denial
• Billing 90863 same day as E/M (NCCI violation)
• Missing modifier -25 on E/M when billing with psychotherapy add-ons
• Not verifying whether the payer recognizes PMHNP as an independent billing provider

Code Type	Example Codes	PMHNP Eligible?	Key Requirement
Diagnostic Evaluation	90791, 90792	Yes	90792 requires prescribing authority
Psychotherapy	90832, 90834, 90837	Yes	Must meet time thresholds
E/M Services	99202–99215	Yes (if allowed)	MDM or time-based rules apply
Add-On Psychotherapy	+90833, +90836, +90838	Yes	Requires E/M base + modifier -25
Screening	96127	Yes	Per standardized instrument
Medication Management	90863	Conditional	Cannot bill with same-day E/M (NCCI)
Independent Billing	Own NPI	Yes (FPA states)	85% MPFS Medicare reimbursement
Incident-to Billing	Physician NPI	Conditional	100% MPFS; requires physician supervision

How to Submit Psychiatric Claims to Major Insurance Providers

The claim submission workflow for psychiatric billing has more checkpoints than therapy-only billing. Miss one step and the claim either goes to the wrong payer or comes back denied for a reason that had nothing to do with the code you selected.

Step 1: Verify Psychiatric Benefits (Carve-Out Check)

Before the first appointment, run an EDI 270/271 eligibility verification transaction. But don’t stop there. You must identify whether the psychiatric benefit is carved out to a managed behavioral health organization (MBHO).

A patient with Aetna medical coverage might have psychiatric benefits administered by Carelon. If you submit the claim to Aetna, it comes back CO-109 — wrong payer. Check the insurance card for a separate behavioral health phone number. Call if the electronic verification doesn’t specify the carve-out.

Step 2: Prior Authorization

Many psychiatric services require prior authorization, especially:

• Initial psychiatric evaluations (some payers)
• TMS treatment series
• ECT procedures
• Inpatient psychiatric admissions
• Ongoing psychotherapy beyond session limits

Prior authorization numbers must appear on the CMS-1500 form. Missing authorization triggers CO-204 or CO-197 denials.

Step 3: Document and Code

Match the documentation to the code. A 99214 requires moderate MDM. A +90836 add-on requires 38–52 minutes of documented psychotherapy time. An ICD-10 diagnosis must link to a DSM-5-TR diagnosis that supports medical necessity.

Step 4: CMS-1500 Submission

Outpatient psychiatric professional claims go on the CMS-1500 form, submitted electronically as ANSI 837P transactions through a clearinghouse. Key fields:

• Diagnosis pointer mapping (A–L) — link each CPT code to the correct ICD-10
• Place of service: POS 11 (office), POS 02 (telehealth non-home), POS 10 (telehealth home)
• Modifiers: -25 on E/M when billing add-on psychotherapy, -95 for video telehealth, -FQ for audio-only Medicare

Step 5: Payer-Specific Routing

• Medicare Part B — direct submission through MAC
• Medicaid — state-specific managed care plans
• Commercial — may route to medical benefit or BH carve-out
• Optum/Carelon/Magellan — separate claim portals and authorization systems

Step 6: Denial Management

Common psychiatric claim denial codes:

• CO-97 — bundling denial (NCCI edit triggered — 90863 + E/M same day)
• CO-50 — not medically necessary (insufficient documentation for E/M level)
• CO-4 — modifier error (missing -25 on E/M with add-on psychotherapy)
• CO-11 — diagnosis mismatch (ICD-10 doesn’t support the billed service)
• CO-16 — missing information (incomplete CMS-1500 fields)
• CO-204 — authorization missing
• CO-29 — timely filing exceeded

Each denial has a correction pathway. CO-97 requires reviewing the NCCI edit pair and either rebilling with the correct code or appending modifier -59 if services were truly distinct. For a detailed denial resolution framework, see our guide on preventing and appealing mental health billing denials.

Step	Process	Key Action	Risk If Missed
1	Eligibility	Verify coverage + carve-out payer	CO-109 wrong payer
2	Authorization	Obtain PA for TMS, ECT, inpatient	CO-204 / CO-197
3	Documentation	Record diagnosis, time, MDM, notes	CO-50 medical necessity
4	Coding	Assign CPT + ICD-10 + modifiers	CO-11, CO-4
5	CMS-1500	Complete all claim fields	CO-16 missing info
6	Submission	Send via 837P through clearinghouse	Format rejection
7	Adjudication	Payer processes claim	CO-119 benefit limits
8	Denials	Review ERA (835) / EOB	CO-97, CO-50, CO-4
9	Appeals	Corrections and resubmissions	CO-29 timely filing
10	Payment	Post ERA to patient account	Reconciliation errors

Common CPT Codes for Psychotherapy Sessions in Psychiatry

Psychiatrists don’t just manage medications. Many provide psychotherapy — and the billing rules for psychotherapy in psychiatric practice are different from how a therapist bills the same service.

When a Psychiatrist Bills Standalone Therapy Codes

When a psychiatrist provides only psychotherapy — no medication adjustment, no medical evaluation — they bill the same standalone codes as any therapist:

• 90832 — 16–37 minutes face-to-face
• 90834 — 38–52 minutes face-to-face
• 90837 — 53+ minutes face-to-face

Some payers question psychiatrists billing standalone therapy. The documentation must clearly reflect that the session focused on psychotherapy — CBT, DBT, psychodynamic therapy, or another modality — without a medical management component.

Add-On Codes for Combined E/M + Therapy

The more common scenario in psychiatry: the provider spends part of the visit on medication management (E/M) and part on psychotherapy. This is where add-on codes come in:

• 99214 + 90833 — moderate MDM E/M + 16–37 min therapy (modifier -25 on 99214)
• 99214 + 90836 — moderate MDM E/M + 38–52 min therapy (modifier -25 on 99214)
• 99213 + 90833 — low MDM E/M + 16–37 min therapy (modifier -25 on 99213)

The E/M level is determined by MDM — not time — when billed with psychotherapy add-ons. Time spent on E/M activities does not count toward psychotherapy minutes. The two time pools must be completely separate.

Modifier -25: The Rule That Triggers Half the Denials

Modifier -25 on the E/M code tells the payer: “This E/M service was significant and separately identifiable from the psychotherapy.” Without -25, the payer sees two services and denies the add-on as CO-4 (modifier error) or CO-97 (bundling).

Documentation must support the modifier. The E/M note and the psychotherapy note should reflect distinct clinical activities. A single blended note that doesn’t separate the medication discussion from the therapy content will fail on audit.

The NCCI Medication Management Conflict

This is the rule most psychiatric practices get wrong:

NCCI edits prohibit billing medication management (90863) on the same day as an E/M code or psychotherapy code by the same provider.

If the visit starts as medication management but the clinical discussion extends into therapy, the service shifts to E/M + psychotherapy add-on. You cannot bill 90863 alongside 99214 or 90834. The codes are mutually exclusive on the same date of service.

When a psychiatrist provides both medication oversight and therapy in one visit, the correct billing is E/M + psychotherapy add-on — not medication management + therapy.

Time Documentation

Start and stop times are required for all psychotherapy codes. The documentation must show:

• When psychotherapy began and ended
• When E/M activities occurred (separately)
• Total face-to-face psychotherapy time
• That the times do not overlap

Audits frequently target 90837 and +90838 because of the high reimbursement and strict 53-minute threshold.

Visit Scenario	Codes to Bill	Modifier	Time Requirement	Common Denial Risk
Therapy-only visit	90834	None	38–52 min	Under-time CO-50
Long therapy session	90837	None	53+ min	Missing timestamps
E/M + brief therapy	99213 + 90833	-25 on E/M	≥16 min therapy	Missing modifier CO-4
E/M + extended therapy	99214 + 90836	-25 on E/M	≥38 min therapy	Bundling CO-97
Medication management only	90863	None	≥16 min	Same-day E/M conflict
Combined med + therapy	99214 + 90833/36	-25 on E/M	Split time required	Double-counting time
Crisis psychotherapy	90839	None	30–74 min	Improper combination
Group therapy	90853	None	~50 min	Incorrect pairing

Psychiatric Billing Software — Top Features to Look For

Choosing billing software for a psychiatric practice isn’t the same as choosing software for a therapy clinic. Psychiatrists need e-prescribing, E/M + add-on code logic, medication management templates, and NCCI compliance checking that most therapy-focused platforms don’t offer.

Must-Have Features for Psychiatry

Not every EHR or practice management system handles psychiatric billing well. These features separate platforms that work for psychiatrists from platforms that work for therapists:

• EPCS (Electronic Prescribing for Controlled Substances) — psychiatrists prescribe Schedule II–V medications. EPCS integration with DEA compliance and two-factor authentication isn’t optional. It’s a federal requirement.
• E/M + psychotherapy add-on auto-detection — software that recognizes when an E/M code is billed alongside a psychotherapy code and auto-appends modifier -25
• Medication management documentation templates — structured fields for the 12-element documentation checklist (diagnosis, medication history, side effects, lab values, mental status exam)
• NCCI edit alerts — real-time warnings when 90863 is billed same-day with E/M or psychotherapy
• DSM-5 to ICD-10 crosswalk — automated mapping from diagnostic criteria to billing codes
• Prior authorization tracking — dashboard for TMS, ECT, and inpatient authorization status
• Claim scrubbing — pre-submission validation of CPT codes, modifiers, diagnosis pointers, and payer rules
• ERA auto-posting (835) — automated payment posting from electronic remittance advice
• Eligibility verification (270/271) — with carve-out detection for behavioral health payers
• Telehealth integration — auto-population of modifier -95 or -FQ and correct POS codes (02 vs 10)

Software Comparison

Platform	Cost Range	EPCS	Coding Automation	Prior Auth	Telehealth	Best For
TherapyNotes	$79–$99/mo	Yes	Basic	Limited	Yes	Solo / therapy-heavy
SimplePractice	$79–$99/mo	Yes	Basic	Basic	Yes	Solo / small group
Valant	$150–$250/mo	Yes	Advanced	Yes	Yes	BH groups (psychiatry focus)
AdvancedMD	$250–$400/mo	Yes	Advanced	Yes	Yes	Multi-specialty large practice
Kareo/Tebra	$100–$200/mo	Yes	Moderate	Basic	Yes	Mixed clinics
DrChrono	$150–$300/mo	Yes	Advanced	Moderate	Yes	Mobile-first practices
ICANotes	$100–$150/mo	Yes	Moderate	Limited	Yes	Psychiatry-focused EHR
Athenahealth	$300–$600+/mo	Yes	Advanced	Yes	Yes	Enterprise systems
Netsmart	Custom	Yes	Advanced	Yes	Yes	Public-sector BH orgs
Qualifacts	Custom	Yes	Advanced	Yes	Yes	Community BH organizations

Software vs Outsourced Billing

Software handles claim transmission. It doesn’t resolve denials. When a CO-97 bundling denial comes back on a 90863 + 99214 same-day conflict, your biller needs to understand the NCCI logic, determine whether to rebill as E/M + psychotherapy add-on, and resubmit with correct codes and modifier -25. That’s an expertise question, not a software question.

For practices with denial rates above 10%, complex payer mixes (Medicare + Medicaid + commercial carve-outs), or limited administrative staff, outsourcing psychiatric billing is often more cost-effective than software alone. The real comparison isn’t software vs outsourcing — it’s control vs expertise. For detailed cost analysis, see our guide on mental health billing services cost.

Inpatient Psychiatric Billing — Unique Rules and Codes

No competitor ranking for “psychiatric billing services” covers inpatient billing. That’s a gap. If your practice includes hospital-based services or you’re billing for inpatient psychiatric care, this section is where the real complexity lives.

Professional vs Institutional Billing

Inpatient psychiatric billing splits into two separate claims:

Institutional billing (UB-04 / 837I): The hospital submits facility charges — room and board, pharmacy (0250), laboratory (0300), nursing care, and ancillary services. These use revenue codes.

Professional billing (CMS-1500 / 837P): The psychiatrist, PMHNP-BC, or PA bills professional services — evaluations, therapy, ECT, rounds — under their individual NPI.

Both claims go to the same payer, but they’re processed separately. A hospital-employed psychiatrist can still bill professional services on CMS-1500 if billing under their individual NPI.

Revenue Codes for Inpatient Psychiatric Services

Revenue codes on the UB-04 define the room type and service category:

Revenue Code	Description	Use Case
0114	Psychiatric — private room	Single-patient accommodation
0124	Psychiatric — semi-private room	Shared room (2-bed)
0126	Behavioral health / substance abuse	SUD-specific services
0134	Psychiatric — 3–4 bed room	Multi-bed unit
0144	Psychiatric — deluxe private	Premium accommodation
0154	Psychiatric — ward	General inpatient ward
0204	Psychiatric — intensive/other	Specialized intensive units
0250	Pharmacy	Medication charges
0300	Laboratory	Diagnostic testing
0900	Behavioral health general	General psychiatric services
0911	Psychiatric rehabilitation	Therapy and recovery programs

Authorization Requirements

Inpatient psychiatric admissions require prior authorization. For Medicaid fee-for-service clients, specific EPA (Expedited Prior Authorization) numbers apply:

• EPA 870001610 — Involuntary Treatment Act (ITA) admissions
• EPA 870001611 — Voluntary admissions

The EPA number must appear in the Prior Authorization Number field on the claim. A new EPA is required whenever there’s a change in legal status, principal diagnosis, or hospital of service. Authorized days must match the PA record — unauthorized days are noncovered and must be billed on separate claim lines.

For managed care enrollees, authorization comes from the MCO or the MCO’s Behavioral Health Services Organization (BHSO).

The 24-Hour Evaluation Rule

Each person admitted to an inpatient psychiatric facility must be examined and evaluated by a licensed physician or P-ARNP within 24 hours of admission, or payment will be denied.

This isn’t a guideline. It’s a hard rule. No evaluation within 24 hours = no payment for that admission date. The evaluation is typically billed as 90791 or 90792, or as an initial inpatient E/M code (99221–99223).

Professional Services During Inpatient Stay

For each day of inpatient psychiatric care, allowable professional services include:

A day’s rounds plus one of the following:

• Individual psychotherapy (up to 1 hour)
• Multiple/family group therapy
• Group therapy
• ECT (90870 — limited to 1 per client per day)
• Narcosynthesis (90865)

Court testimony (CPT 99075) is billable per hearing for involuntary admission proceedings.

Split Billing When Care Focus Changes

When a patient’s care focus shifts from psychiatric to medical (or medical to psychiatric), services must be billed on separate claims. This happens when:

• A psychiatric inpatient develops a medical complication requiring primary medical management
• A medical patient develops an acute psychiatric crisis requiring psychiatric admission

Revenue codes change when the focus shifts. Documentation must clearly establish the date and clinical reason for the focus change.

Voluntary vs Involuntary Admission Billing

Legal status affects billing directly:

• SCI=V (voluntary) in the Special Claims Indicator field
• SCI=I (involuntary) in the Special Claims Indicator field

Voluntary and involuntary portions of a stay must be authorized separately and billed separately. For involuntary admissions under ITA, the payer does not cover past the 20th calendar day from initial detention without a length-of-stay extension certification from the BH-ASO.

Medicare Part A Exhaustion

Medicare Part A covers inpatient psychiatric care in general hospitals without a day limit, but freestanding psychiatric hospitals have a 190-day lifetime benefit limit. When Part A benefits are exhausted during a psychiatric stay, the hospital must obtain authorization for Medicaid payment as secondary payer.

Medicare’s Inpatient Psychiatric Facility Prospective Payment System (IPF PPS) reimburses using per diem rates adjusted by APR-DRGs (740–760, 770, 772–776), length of stay, severity of illness, and wage index. ECT receives an additional per-treatment adjustment.

Outsource Psychiatric Billing — Benefits for Busy Practices

Most psychiatric practices face the same question every therapy practice faces: handle billing in-house or outsource it? The math usually favors outsourcing for psychiatry specifically because the coding is more complex.

What Outsourced Psychiatric Billing Includes

A specialized psychiatric billing company handles:

• Eligibility verification (270/271) with carve-out detection
• Prior authorization for TMS, ECT, and inpatient admissions
• Coding: 90792, E/M + psychotherapy add-ons, medication management
• Claim scrubbing (NCCI edits, modifiers, medical necessity)
• CMS-1500 submission via 837P through clearinghouses
• UB-04 coordination for inpatient psychiatric billing
• ERA/EOB payment posting (835 processing)
• Denial management — CO-97 bundling, CO-50 medical necessity, CO-4 modifier errors
• AR follow-up on unpaid claims
• Patient statements and balance management
• Credentialing — PECOS, CAQH, commercial payer enrollment
• Monthly reporting and analytics dashboards

The Real Cost Comparison

A fully loaded in-house psychiatric biller costs $70,000–$100,000 per year when you add salary, benefits, software licenses, clearinghouse fees, training, and management overhead.

Outsourcing at 6–8% of collections on $600,000 in annual revenue costs approximately $36,000–$48,000 per year.

The break-even point is roughly $700,000–$1,000,000 in annual revenue. Below that, outsourcing is almost always cheaper.

Dimension	In-House	Outsourced	Advantage
Annual Cost	$70K–$100K	~$36K–$54K (6–9%)	Outsourced
Denial Rate	~15–20%	<5%	Outsourced
AR Days	45–60 days	28–35 days	Outsourced
Staffing	Requires hiring + training	Included in service	Outsourced
Expertise	General billing knowledge	Psychiatry-specialized	Outsourced
Scalability	Limited by staff	Highly scalable	Outsourced
Compliance Updates	Manual tracking	Vendor-managed	Outsourced

When Outsourcing Makes Financial Sense for Psychiatry

• Solo psychiatrist — almost always cheaper than hiring a dedicated biller
• Small group (2–5 providers) — outsourcing or hybrid recommended
• Denial rate above 10% — outsource immediately while fixing root causes
• Complex payer mix (Medicare + Medicaid + multiple commercial carve-outs) — specialized routing expertise needed
• Adding inpatient services — UB-04 facility billing requires dedicated knowledge
• PMHNP practice — credentialing and taxonomy code management adds complexity
• High staff turnover — outsourcing provides continuity regardless of hiring challenges

For practices evaluating whether to outsource, see our guides on outsourcing mental health billing and how to choose a mental health billing service.

How to Choose a Psychiatric Billing Service for Small Practices

Choosing a billing partner for a psychiatric practice is different from choosing one for a therapy clinic. The vendor must understand dual-coding logic, NCCI restrictions, medication management rules, payer carve-outs, and — if applicable — inpatient facility coordination.

Questions to Ask Before Signing

• What percentage of your clients are psychiatric practices specifically (not general therapy)?
• Do you handle 90792, E/M + psychotherapy add-on coding, and 90863 NCCI conflicts?
• What is your average denial rate for psychiatric claims? (Target: <7–10%)
• What is your average days in AR? (Target: <30–35 days)
• Do you report net collections or gross collections?
• What is your fee structure? (Percentage, flat per claim, or retainer?)
• Do you handle credentialing and payer enrollment?
• Do you manage prior authorizations for TMS, ECT, and inpatient admissions?
• Can I export all billing data if I terminate the contract?
• Do you process small claims below $50? Or ignore them?
• What clearinghouse do you use? (Waystar, Change Healthcare, etc.)

Red Flags in Billing Company Proposals

• No HIPAA Business Associate Agreement (BAA) offered upfront — walk away
• Proprietary software with no data export — data lock-in trap
• Guaranteed 95%+ collections without seeing your data — no legitimate company guarantees results before reviewing your payer mix and denial patterns
• Reporting gross collections only — inflated numbers that hide real performance
• No psychiatric-specific experience — general medical billing companies applying therapy billing logic to psychiatric claims
• Denial management charged as add-on — it should be included in the base fee
• 90+ day termination notice — too restrictive for a service relationship

Net Collections vs Gross Collections

This is how billing companies hide poor performance.

Gross collections = total amount billed or claims submitted. A company can report “90% gross collections” while actually collecting only 70% of what’s contractually owed.

Net collections = actual revenue collected versus the allowed amount from payer contracts. This is the real number. Always verify by requesting sample monthly reports showing charges, contractual adjustments, payments, and write-offs.

Onboarding and Data Migration

A typical onboarding timeline runs 30–60 days:

• Payer enrollment verification and updates
• EDI enrollment (837P/835 setup) with clearinghouse
• Fee schedule configuration
• EHR integration and data mapping
• Legacy AR assessment (will the new company work your outstanding receivables?)
• Staff training on new workflows
• Parallel billing period (running both systems for 30 days)

The critical question: who owns outstanding AR if you terminate later? Get this in writing before signing.

Criteria	What to Ask	Red Flag	Green Flag
Coding Expertise	Handle 90792, E/M, add-ons?	No psychiatry experience	Demonstrates real cases
Denial Rate	Average denial rate?	>12–15%	<7–10%
AR Days	Average AR days?	>45–60 days	<30–35 days
Fee Structure	What are fees?	Vague pricing	Clear % or flat fee
Data Ownership	Can I export data?	No access	Full CSV/EDI export
Contract Terms	Termination period?	90+ days	30–60 days
Reporting	Net or gross?	Gross only	Net collections
Credentialing	Included?	Not offered	Standard inclusion
Tech Stack	Clearinghouse?	Proprietary only	Standard integrations
Claims Handling	Small claims?	Ignored	Fully processed
Compliance	HIPAA BAA?	None offered	Signed BAA at onboarding
Support	Account manager?	Generic helpdesk	Dedicated contact

Voice Search Q&A

What is psychiatric billing? Psychiatric billing is the process of submitting insurance claims for services provided by psychiatrists, psychiatric nurse practitioners, and physician assistants in mental health. It includes E/M codes for medication management, psychotherapy add-on codes, diagnostic evaluations like 90792, and procedures such as ECT and TMS.

What CPT codes do psychiatrists use? Psychiatrists commonly use CPT codes 90792 for psychiatric evaluations with medical services, 99213 through 99215 for E/M medication management visits, psychotherapy add-on codes 90833, 90836, and 90838, and procedure codes 90870 for ECT and 90867 through 90869 for TMS.

Can a psychiatric nurse practitioner bill independently? Yes, in states with full practice authority, a PMHNP can bill independently under their own NPI using taxonomy code 363LP0808X. Medicare reimburses at 85% of the Physician Fee Schedule for independent NP billing. In restricted states, incident-to billing under a supervising psychiatrist pays at 100%.

How much does outsourced psychiatric billing cost? Most psychiatric billing companies charge between 4% and 10% of net collections, with the average around 6 to 8 percent. For a practice collecting $600,000 per year, that works out to roughly $36,000 to $48,000 annually — typically less than hiring a full-time in-house biller.

What is the difference between 90791 and 90792? CPT 90791 is a psychiatric diagnostic evaluation without medical services. Any qualified mental health provider can bill it. CPT 90792 is a psychiatric diagnostic evaluation with medical services, requiring prescribing authority. Only psychiatrists, PMHNPs, and PAs with prescribing scope can bill 90792.

What is the 24-hour rule for inpatient psychiatric billing? Inpatient psychiatric admissions require that a licensed physician or psychiatric nurse practitioner examine and evaluate the patient within 24 hours of admission. If this evaluation does not occur within 24 hours, payment for the admission is denied.

Frequently Asked Questions

Wrapping Up

Psychiatric billing operates in its own lane. It’s not therapy billing with medication added on top. It’s a dual-coding system where E/M, psychotherapy, medication management, and procedural billing all intersect — governed by NCCI edits, payer carve-outs, modifier rules, and documentation requirements that most general billing teams aren’t built to handle.

The practices that treat psychiatric billing like standard mental health billing are the ones running 15–20% denial rates. The practices that understand dual-code triage, modifier -25 logic, 90792 prescribing context, and the 90863 same-day restriction are the ones collecting what they’ve earned.

Whether you handle billing in-house with the right software, outsource to a specialized psychiatric billing partner, or run a hybrid model, the fundamentals in this guide are the operational baseline. Get them right, and your revenue cycle stops leaking money.