CPT 90791 vs 90792: Intake Documentation for Therapists vs Psychiatrists

90791 vs 90792: the core distinction

CPT 90791 is a psychiatric diagnostic evaluation without medical services. CPT 90792 is a psychiatric diagnostic evaluation with medical services. In practice, this is the single most important distinction: 90791 is the intake code most commonly used by psychologists, LCSWs, LMFTs, LPCs, LMHCs, and other non-prescribing clinicians; 90792 is reserved for clinicians who are performing medical work as part of the evaluation, such as medication review, pharmacologic assessment, or other medically oriented services that go beyond psychotherapy-style interviewing.

The codes are similar in structure, but they are not interchangeable. If a therapist performs a standard diagnostic intake, gathers biopsychosocial history, establishes a preliminary diagnosis, assesses risk, and develops an initial plan, that is generally 90791. If a psychiatrist or other qualified prescriber conducts the intake and also performs medical services, that is generally 90792. For related note structure and terminology, many clinicians also find it useful to review a SOAP notes guide because the assessment and plan elements often overlap with intake documentation expectations.

Do not assume 90792 is simply “90791 for psychiatrists.” The medical-services component matters. If a prescriber only performs a non-medical diagnostic interview, verify payer policy and documentation expectations before defaulting to 90792. Likewise, if a non-prescribing therapist provides a diagnostic intake, billing 90792 would be inaccurate and potentially audit-prone.

From a documentation standpoint, both codes require a comprehensive diagnostic interview and clinical judgment. The difference is not whether the note is “long enough.” The difference is whether medical services were actually provided and supported in the record.

Who bills each code and when

Use 90791 when the clinician is performing a diagnostic assessment as part of behavioral health care and is not providing medical services. In outpatient practice, that usually means a therapist or psychologist completing an intake to establish diagnosis, evaluate symptoms, screen for risk, review history, and determine level of care. It can also be used by some non-prescribing behavioral health clinicians in integrated care settings, depending on payer and credentialing rules.

Use 90792 when the evaluation includes medical services. That generally means the prescriber is evaluating psychiatric symptoms through a medical lens, considering medication initiation or management, reviewing current and prior prescriptions, assessing side effects, and incorporating medical decision-making into the intake. For most billing workflows, the service should clearly read like a medical psychiatric evaluation, not merely a psychotherapy intake with a title change.

Here is a practical way to think about it: if you could swap the clinician’s role with a non-prescribing therapist and the note would still be accurate, the service likely belongs in the 90791 family. If the service depends on prescribing authority, medication expertise, or other medical assessment elements, 90792 may be appropriate.

When in doubt, check payer policy and credentialing rules. Some insurers define eligible rendering providers narrowly, and some health systems require specific intake workflows. That is especially important when behavioral health is billed under delegated credentialing, hospital outpatient departments, or collaborative care arrangements. For broader note-keeping standards across intake and treatment episodes, clinicians often pair this article with progress notes guidance to ensure the intake supports the subsequent plan of care.

One common edge case is the advanced practice clinician who can prescribe in one setting but is functioning in a strictly psychotherapeutic role in another. Billing should follow the actual service rendered, not the clinician’s credentials alone. Another edge case is a therapist who gathers medication history or notes that the client may benefit from a psychiatric referral. That alone does not turn the service into 90792. Referral recommendations and med-history screening are still compatible with 90791 when no medical services are provided.

What documentation each intake must include

Although payer rules vary, strong 90791 and 90792 documentation usually includes the same core intake components: identifying data, chief complaint or reason for referral, history of present illness, psychosocial and family history, trauma and substance use screening when clinically relevant, mental status exam, risk assessment, diagnostic impression, and an initial treatment or disposition plan. For 90792, add the medical services elements that justify the code, such as current medications, prior psychotropic trials, relevant medical history, side effects, and the prescriber’s medical decision-making.

It is useful to think in terms of clinical sufficiency rather than template completion. A crowded template does not protect a weak note. A concise note that documents why the evaluation occurred, what was assessed, how the diagnosis was reached, and what the next clinical step is will usually perform better than a verbose but unfocused intake.

DSM-5-TR diagnosis should be supported by symptoms and duration. ICD-10-CM coding should match the documented condition. For example, major depressive disorder, recurrent, moderate is commonly coded as F33.1; generalized anxiety disorder as F41.1; posttraumatic stress disorder as F43.10; and bipolar I disorder, current episode manic, severe, without psychotic features as F31.13 when clinically appropriate. Always verify the exact ICD-10-CM code set used by your payer and current year coding resources.

For the 90791 note, your language should show that you performed a psychiatric diagnostic evaluation, not just an intake questionnaire review. For the 90792 note, the record should explicitly show medical services. Examples include medication reconciliation, adverse effect review, discussion of risks and benefits of medication options, and a medical rationale for psychiatric treatment planning. If you want a deeper breakdown of documentation structure, the clinical terminology for progress notes article is a useful companion for precise phrasing.

Common coding mistakes and audit triggers

The most common error is billing 90792 when the record does not support medical services. If the note reads like a standard intake interview without medication evaluation, prescribing discussion, or other medically oriented content, the code may be indefensible. A second common error is using 90791 for a prescriber who clearly performed a medical psychiatric evaluation and documented medication management elements. That can lead to undercoding, denied claims, or compliance questions if the chart and claim do not match.

Another audit trigger is a template-heavy note that lists every conceivable history item but fails to explain the clinical formulation. Reviewers often look for a coherent bridge between symptoms, diagnosis, and plan. If the client presents with panic symptoms, the note should explain the frequency, duration, triggers, functional impact, and why the diagnosis selected was the best fit. If trauma, depression, or substance use are clinically relevant, document those findings specifically rather than relying on a generic checkbox.

Watch for these high-risk patterns:

• Billing the intake code and a psychotherapy code for the same service without clear separation of time and service type.
• Documenting only a questionnaire review with no clinical interview or diagnostic analysis.
• Using copy-forward language that creates contradictions across episodes of care.
• Recording medication discussions in a 90791 note when the clinician is not authorized or not actually providing medical services.
• Using a diagnosis unsupported by the symptom narrative or duration criteria.

If your practice also documents treatment recommendations in a structured format, a treatment plan writing guide can help align the intake assessment with measurable goals, interventions, and frequency of care.

For high-volume practices, the cleanest defense against audit risk is consistency: same terminology, same workflow, same logic from intake through treatment plan. That does not mean every note should look identical. It means the clinician’s reasoning should be visible. If you cannot tell from the note why 90791 or 90792 was selected, the payer probably cannot either.

Sample note example

Below are two abbreviated documentation snippets that show how the same clinical encounter can be documented differently depending on the code and the rendering provider’s role.

These snippets are intentionally concise. The goal is not to write more, but to write the right facts in a way that matches the code. If your practice prefers standardized documentation shells, consider pairing this approach with the templates in MentalNote templates so the note structure stays consistent while the content remains clinician-specific.

A practical workflow for cleaner intakes

A strong intake workflow starts before the session. The referral source, presenting problem, and likely service type should be clear before the clinician enters the room. If the client is scheduled with a therapist, the intake should be framed as 90791 unless the therapist is also functioning within a medical service model that is specifically authorized and documented. If the client is scheduled with a prescriber, the scheduling and template should support 90792 only when a medical evaluation is actually occurring.

During the session, gather the data needed to support the diagnosis and plan, but avoid turning the intake into a data dump. Ask focused follow-up questions that inform clinical decision-making: onset, severity, triggers, functional impact, prior treatment response, safety concerns, and supports. For prescribers, include medication history and medical considerations. For therapists, document enough diagnostic depth to support the chosen ICD-10-CM code and the initial treatment trajectory.

After the session, finish with a clean assessment summary. State why the diagnosis fits, what level of care is indicated, and what happens next. If symptoms are ambiguous, document that ambiguity and your differential rather than forcing an unsupported label. That level of nuance matters in real-world documentation and is often what separates a defensible note from a merely complete-looking note.

When intake documentation gets repetitive, well-designed tools can reduce cognitive load. For practices that want more structured note-building workflows, the features page shows how documentation automation can support consistency without flattening clinical judgment.

Frequently Asked Questions

Can a therapist ever bill 90792?

Usually no. CPT 90792 requires medical services, so it is generally billed by psychiatrists or other qualified prescribers. A therapist should usually use 90791 for a standard diagnostic intake. Verify payer policy and your state licensing board if the practice model is unusual.

What if the prescriber only does an interview and does not prescribe?

That depends on whether medical services were provided. If the evaluation included a medical psychiatric assessment, 90792 may still be appropriate even if no prescription was written that day. If the encounter was purely diagnostic and non-medical, verify payer expectations before billing 90792.

Do 90791 and 90792 require a mental status exam?

A mental status exam is strongly expected in both intake types, and it is especially important in 90792 documentation. The note should also include diagnostic reasoning, risk assessment when clinically indicated, and a plan or disposition.

Can I bill psychotherapy on the same day as 90791 or 90792?

Sometimes, but only when the psychotherapy service is distinct and separately documented according to payer rules and CPT guidance. You must be able to clearly separate the diagnostic evaluation from psychotherapy in time, purpose, and documentation. Consult your payer and billing guidance for the specific scenario.

What diagnosis code should I put on an intake note?

Use the most accurate ICD-10-CM diagnosis supported by the clinical presentation and your assessment. Examples include F41.1 for generalized anxiety disorder, F33.1 for recurrent moderate major depressive disorder, and F43.10 for posttraumatic stress disorder when clinically appropriate. Always verify the exact code and specifier in current ICD-10-CM resources.