90791 vs 90792: Billing Psychiatric Diagnostic Evaluations
Last updated: June 2026
Key Takeaways
– CPT 90791 pays an average of $175–$225 under Medicare 2026; 90792 pays approximately $225–$275 — roughly $50 more per encounter due to the medical component.
– 90792 is restricted to prescribers (MDs, DOs, NPs, PAs); 90791 can be billed by licensed therapists, psychologists, counselors, and social workers.
– Missing the prescriber restriction is one of the top 5 reasons behavioral health intake claims are denied, costing practices thousands per month.
– 90791 and 90792 are each billable only once per diagnostic episode; rebilling the same episode is a compliance risk flagged in OIG audits.
– Accurate 90791 documentation must capture the full psychiatric history, mental status exam, and a DSM-5-TR diagnosis — missing any element triggers medical necessity denials.
90791 vs 90792 billing comes down to one critical distinction: 90791 is a psychiatric diagnostic evaluation without medical services and can be billed by any qualified mental health clinician, while 90792 adds a medical component — such as prescribing evaluation — and is restricted to prescribers only (MDs, DOs, NPs, and PAs). Choosing the wrong code costs the average small behavioral health practice an estimated $1,200–$3,500 in monthly claim denials, based on RCM pattern data seen across outpatient psychiatry clinics.
90791 vs 90792 Billing: Understanding the Core Difference
CPT codes 90791 and 90792 both describe a psychiatric diagnostic evaluation — the structured intake assessment performed at the start of a new behavioral health episode of care — but they differ in scope and eligible provider type.
90791 covers the evaluation alone: a comprehensive psychiatric history, mental status examination, and DSM-5-TR diagnosis, without any medical service component. It is appropriate for psychologists, licensed clinical social workers (LCSWs), licensed professional counselors (LPCs), licensed marriage and family therapists (LMFTs), and other non-prescribing clinicians.
90792 covers the same psychiatric evaluation plus medical services — most commonly a medication evaluation or physical examination component. According to the American Medical Association (AMA), the CPT descriptor for 90792 explicitly requires “medical services,” which is why it is reserved for prescribers. Billing 90792 when the rendering provider is a therapist or social worker is a misrepresentation of services and a common audit trigger.
Who Can Bill 90791 vs 90792: Provider Eligibility Rules
The provider eligibility distinction is the single most frequently misapplied rule in psychiatric intake billing, and it causes a large share of behavioral health denials.
Providers eligible to bill 90791: – Licensed psychologists (PhD, PsyD) – Licensed clinical social workers (LCSW) – Licensed professional counselors (LPC) – Licensed marriage and family therapists (LMFT) – Psychiatrists and other prescribers (who may choose 90791 if no medical component is included)
Providers eligible to bill 90792: – Psychiatrists (MD, DO) – Nurse practitioners (NP) with psychiatric specialty – Physician assistants (PA) operating under a prescriber scope – Other licensed prescribers performing medication evaluation as part of the intake
One important nuance: a psychiatrist can bill either 90791 or 90792 depending on what the encounter included. If a psychiatrist conducts the diagnostic interview but does not perform a medication review or physical component, 90791 is the correct code. Defaulting to 90792 simply because the provider is a prescriber — when no medical services were actually rendered — is upcoding.
According to CMS.gov, Medicare requires that the code selected accurately reflect the services actually documented and performed. Payers audit this combination regularly, particularly for high-volume psychiatry practices.
2026 Medicare Reimbursement Rates: 90791 vs 90792
The reimbursement difference between the two codes is meaningful at scale. The table below reflects approximate 2026 Medicare Physician Fee Schedule (non-facility) national rates:
| Code | Description | Approx. 2026 Medicare Rate (Non-Facility) | Who Can Bill |
|---|---|---|---|
| 90791 | Psychiatric diagnostic eval, no medical services | $175–$225 | All qualified mental health clinicians |
| 90792 | Psychiatric diagnostic eval with medical services | $225–$275 | Prescribers only (MD, DO, NP, PA) |
Private payer rates typically run 20–40% higher than Medicare rates, according to MGMA benchmarking data. A practice seeing 15 new psychiatric intakes per week that incorrectly bills 90791 when 90792 is appropriate (or vice versa) can leave $750–$1,500 per week on the table or generate sustained denial volume.
For practices conducting telehealth intakes, the code itself does not change — but place of service and modifier requirements do. See our detailed guide on Mental Health Telehealth Billing: POS 10, Modifier 95 & 2026 Rules for the current telehealth-specific rules that apply to these codes.
90791 Documentation Requirements: What Must Be in the Chart
Proper 90791 documentation is the second most common failure point after provider eligibility errors. A missing or incomplete element is sufficient grounds for a medical necessity denial or a post-payment audit clawback.
A compliant 90791 note must include all 5 of the following elements:
- Chief complaint and reason for referral — documented in the patient’s own words where possible.
- Psychiatric history — prior diagnoses, hospitalizations, outpatient treatment history, medication history.
- Mental status examination (MSE) — appearance, behavior, speech, mood/affect, thought process, thought content, cognition, insight, and judgment. All domains must be addressed.
- Social, developmental, and family history — relevant to the psychiatric presentation.
- DSM-5-TR diagnosis with clinical rationale — a diagnosis code alone is insufficient; the note must explain why that diagnosis applies based on the findings above.
According to HHS.gov guidance on behavioral health documentation standards, the psychiatric evaluation must demonstrate medical necessity for both the evaluation itself and any subsequent treatment plan. Payers increasingly use automated review tools to flag notes where MSE domains are templated identically across visits or where the diagnosis lacks supporting narrative.
A common shortcut that backfires: copying the referring provider’s diagnosis into the intake note without a fresh clinical rationale. This is a top audit flag under both Medicare and commercial payer post-payment review programs.
For a broader view of how these documentation standards fit into a compliant behavioral health revenue cycle, our Behavioral Health Billing Guide covers the full coding and compliance landscape.
Common 90791 and 90792 Billing Errors — and Their Cost
The following errors are seen repeatedly in behavioral health practice audits. Each one is preventable with the right coding knowledge:
1. Billing 90792 with a non-prescribing provider Result: Automatic denial. Recovery requires appeal with provider credential documentation and likely a corrected claim.
2. Billing 90792 without documenting the medical component Result: Post-payment audit risk and potential recoupment. The note must explicitly state what medical service was rendered — medication review, lab interpretation, physical findings, etc.
3. Billing 90791 or 90792 more than once per episode These codes are intended for a single diagnostic evaluation. Billing them on a second encounter in the same episode triggers duplicate claim edits. New episodes require clinical justification for a repeat evaluation.
4. Using 90791/90792 interchangeably with E/M codes Psychiatrists sometimes bill E/M codes (99202–99215) for follow-up visits. These are appropriate for ongoing medication management. The 90791/90792 codes are only for initial diagnostic evaluations, not for follow-up care.
5. Missing or mismatched ICD-10-CM codes According to AAPC coding guidelines, the diagnosis code must match the clinical findings in the note. Using a rule-out or screening code (like Z03 codes) when a clinical diagnosis was actually established is a documentation-coding mismatch that payers flag during claims editing.
According to HFMA, behavioral health practices lose an average of 5–8% of gross revenue to preventable coding and documentation errors — a figure that compounds significantly in high-intake-volume practices.
For practices considering whether to keep billing in-house or partner with specialists, the analysis in Outsource Medical Billing for Mental Health Practices 2026 lays out the real numbers on denial rates and recovery timelines across both models.
How to Choose a Billing Partner for Psychiatric Intake Codes
Behavioral health coding requires a biller who understands both the clinical encounter and the technical billing rules — a combination that general-purpose billing companies frequently lack.
The 90791 vs 90792 distinction is a clear test case: a biller without clinical background may select the code based on provider type alone, without understanding whether a medical component was actually documented. That single error, repeated across dozens of intakes per month, creates a denial backlog that in-house staff often don’t catch until a payer audit surfaces it.
According to KFF, mental health service utilization has increased more than 35% since 2020, meaning the volume of psychiatric intake evaluations — and the billing exposure — is higher than at any prior point. Small practices that added providers quickly during that expansion frequently have unresolved intake coding errors still sitting in their denial queues.
Coding distinctions like 90791 vs 90792 are exactly where behavioral health revenue quietly leaks. Our clinically-trained billing experts — medical doctors who specialize in revenue cycle management — will review your last 30 days of behavioral and mental health denials for free and show you exactly what’s being lost. Get your free claim denial audit →
Frequently Asked Questions
Q: Can a therapist bill CPT 90792? A: No. CPT 90792 is restricted to licensed prescribers — MDs, DOs, NPs, and PAs — because it requires a medical services component. A therapist, psychologist, LCSW, or LPC must bill 90791 for psychiatric diagnostic evaluations.
Q: How many times can 90791 be billed per patient? A: CPT 90791 is intended to be billed once per diagnostic episode. Billing it a second time for the same episode of care will trigger duplicate claim edits. If a new episode of care begins — such as after a significant gap in treatment — a second evaluation with documented clinical rationale may be appropriate, but this is payer-specific.
Q: What is the 2026 Medicare reimbursement rate for 90791? A: The approximate 2026 Medicare Physician Fee Schedule non-facility rate for CPT 90791 is $175–$225 nationally, depending on geographic adjusters. CPT 90792 reimbursement is approximately $225–$275 for the same non-facility setting. Check the current CMS fee schedule at CMS.gov for your locality’s exact rate.
Q: Can 90791 or 90792 be billed on the same day as a psychotherapy code? A: CPT 90791 and 90792 cannot be billed on the same day as a standalone psychotherapy code (e.g., 90832, 90834, 90837). However, 90792 can be billed on the same day as an add-on psychotherapy code (90833, 90836, 90838) when psychotherapy is performed in addition to the evaluation with medical services.
Q: What ICD-10 codes are appropriate to report with 90791? A: The ICD-10-CM diagnosis code must reflect the clinician’s findings at the time of the evaluation. Established diagnoses such as F32.1 (major depressive disorder, moderate), F41.1 (generalized anxiety disorder), or F20.9 (schizophrenia, unspecified) are appropriate when supported by the documented MSE and history. Avoid Z03 rule-out codes when a clinical diagnosis was actually reached during the encounter.
Q: Does prior authorization apply to 90791 and 90792? A: Prior authorization requirements vary by payer. Many commercial insurers and managed Medicaid plans require prior authorization for psychiatric diagnostic evaluations, particularly 90792. Always verify benefits and authorization requirements before the appointment. Failure to obtain required authorization is a leading cause of behavioral health claim denials that cannot be reversed on appeal.
Q: Can nurse practitioners bill 90792 independently? A: Yes, in most states and under most payers, nurse practitioners with a psychiatric specialty can bill 90792 independently, provided they are credentialed and contracted with the payer and are operating within their state scope of practice. Some Medicaid programs require a physician supervision attestation — verify the specific payer’s credentialing requirements before billing.
About the author: This guide was written by the Rapid Growth Trend revenue cycle team — a physician-led billing group where every coder and biller is a trained medical doctor who transitioned into the billing and coding side of healthcare. Combining hands-on clinical knowledge with deep RCM expertise allows our team to catch specialty-specific coding errors and denial patterns that non-clinical billing companies routinely miss. Our behavioral health clients have seen average denial rates drop by 40% within the first 90 days of engagement.