CPT 90791 is a psychiatric diagnostic evaluation without medical services. CPT 90792 is the same evaluation with medical services, such as a medical history, a medication review and medical decision-making. Which one you bill depends on what the note shows was done, not on who the provider is.
Medicare's coding edits add two rules most denials come from: neither code is billed with an E/M visit code, and neither is billed with a psychotherapy code on the same date of service (Medicare NCCI Policy Manual, Chapter XI).
Why Does the Difference Between CPT 90791 and 90792 Matter?
The code has to describe the service performed and the provider's role. Bill 90792 for an evaluation the note shows had no medical component and the claim can be denied or taken back in an audit. Bill 90791 when medical services were documented and you've under-billed the visit.
So read the note before you pick the code.
What Is CPT 90791?
CPT 90791 is a psychiatric diagnostic evaluation without medical services. It covers understanding the patient's concerns, taking a history, assessing the patient, reaching a diagnostic impression and recommending treatment.
Depending on the provider and payer, the note usually covers:
- Presenting problem and psychiatric history
- Psychosocial, family and social history
- Mental status examination
- Diagnostic assessment
- Treatment plan and recommendations
When Is CPT 90791 Used?
CPT 90791 fits when the visit's main purpose is a psychiatric diagnostic assessment and no medical evaluation or management is done.
Example: A psychologist does an initial evaluation, reviews the patient's psychiatric history, performs a mental status exam, reaches a diagnostic impression and writes a treatment plan, without providing medical services. CPT 90791 may be appropriate when the documentation and payer policy support it.
What Is CPT 90792?
CPT 90792 is a psychiatric diagnostic evaluation with medical services. It combines the psychiatric assessment with medical evaluation and decision-making, so it is billed by a provider who is licensed to provide medical services.
The note usually covers:
- Medical and psychiatric history
- Current medications and medication decisions
- Relevant medical conditions
- Mental status examination
- Medical decision-making
- Treatment recommendations that take both psychiatric and medical factors into account
When Is CPT 90792 Used?
CPT 90792 fits when the evaluation includes medical services.
Example: A psychiatrist evaluates a patient with depression, reviews psychiatric and medical history, evaluates current medications, makes a medication decision and writes a treatment plan. When the service meets the code requirements and payer rules, CPT 90792 may be appropriate.
CPT 90791 vs 90792: What's the Difference?
90791 = Psychiatric diagnostic evaluation without medical services
90792 = Psychiatric diagnostic evaluation with medical services
Feature | CPT 90791 | CPT 90792 |
|---|---|---|
Service | Psychiatric diagnostic evaluation | Psychiatric diagnostic evaluation with medical services |
Medical services | No | Yes |
Primary focus | Psychiatric/clinical assessment | Psychiatric assessment plus medical evaluation |
Medication management | Not included as a medical service | May be part of the encounter when appropriately performed and documented |
Documentation | Clinical assessment and treatment planning | Clinical assessment plus relevant medical components |
Provider eligibility | Depends on payer and provider qualifications | Depends on payer and provider qualifications |
Payer requirements | Must be verified | Must be verified |
CMS identifies 90791 and 90792 as the two psychiatric diagnostic evaluation codes and states that E/M codes shall not be reported with them (Medicare NCCI Policy Manual, Chapter XI). The same chapter allows the interactive complexity add-on, 90785, with either code when communication factors make the evaluation harder.
Common Billing Scenarios for CPT 90791 and 90792
Scenario 1: Initial Evaluation by a Psychologist
A psychologist does a full psychiatric diagnostic evaluation, reviews the history, performs a mental status exam and writes a treatment plan. No medical services are provided.
Potential code: CPT 90791
Scenario 2: Psychiatric Evaluation With Medical Services
A psychiatrist performs a psychiatric evaluation and also provides medical evaluation and decision-making in the same visit.
Potential code: CPT 90792
The note has to show the medical services. If it doesn't, the code is 90791.
Scenario 3: Telehealth Psychiatric Evaluation
A behavioral health provider does the evaluation by telehealth. The code still depends on the service performed, the provider's qualifications and the payer's telehealth rules, which have changed often. Check the payer's current policy, including its place of service and modifier requirements, before the claim goes out.
Medicare and Insurance Considerations
Don't assume every payer applies CPT the same way.
Medicare recognizes both 90791 and 90792, subject to its coverage and provider rules, and the documentation has to support medical necessity. Medicaid rules vary by state, and commercial plans set their own policies on:
- Provider eligibility
- Coverage and frequency (how many evaluations a patient can have in a period)
- Prior authorization
- Telehealth
- Modifiers and documentation
- Reimbursement
Check the payer's current policy before you bill, and save what you found with the claim.
Common CPT 90791 and 90792 Billing Mistakes
1. Choosing the Code Without Reviewing the Documentation
Choosing 90792 because the provider is a psychiatrist is a common error. The note has to show the medical services.
2. Billing Both Codes Inappropriately
Billing 90791 and 90792 for the same evaluation is a duplicate. One evaluation gets one code.
3. Ignoring Payer-Specific Rules
A CPT code's definition doesn't mean every payer handles coverage, eligibility and payment the same way.
4. Insufficient Documentation
The note has to support the evaluation, medical necessity, the diagnosis, the treatment plan and, for 90792, the medical services.
5. Incorrectly Reporting Additional Services
Medicare's NCCI policy treats psychotherapy as including continuing psychiatric evaluation, so 90791 and 90792 are not separately reportable with individual, group, family, crisis or other psychotherapy codes on the same date of service. An E/M code on the same date is also an edit.
Documentation Checklist Before You Bill
- Who performed the evaluation, and is that provider enrolled with the payer for this service?
- Does the note have a history, a mental status exam, a diagnostic impression and a plan?
- For 90792: does it show the medical work (medications, medical conditions, medical decision-making)?
- Is there a psychotherapy or E/M code on the same date for this patient? If so, fix it before submitting.
- Does the diagnosis code match the documented condition?
- Telehealth: are the place of service and modifier what this payer asks for?
Best Practices for Accurate Psychiatric Billing
Match the CPT code to the actual service.
Decide whether the evaluation included medical services before choosing 90791 or 90792.
Review documentation before claim submission.
The record should support the code, the diagnosis, medical necessity and the services provided.
Verify payer requirements.
Check Medicare, Medicaid and commercial payer policies for provider eligibility, authorization, telehealth and other requirements.
Use accurate diagnosis coding.
The diagnosis should match the patient's documented condition and the reason for the visit.
Monitor denials.
Sort denied psychiatric claims by reason to find what keeps repeating: coding, documentation, eligibility or authorization. Our post on behavioral health denials covers the common ones.
Perform regular billing audits.
A periodic review of a sample of claims finds undercoding, overcoding and missing documentation before they become a pattern.
Where Beeline fits
Beeline is a US company with a dedicated billing team. For behavioral health practices it codes evaluations and psychotherapy from the provider's notes, checks them against payer edits before submission, and works the denials that come back. Our behavioral health billing page has a tool to "Find the psychotherapy code" for a session. If you'd like a second look at your claims, start with a free consultation.
Frequently Asked Questions
What is the difference between CPT 90791 and 90792?
CPT 90791 describes a psychiatric diagnostic evaluation without medical services, while CPT 90792 describes a psychiatric diagnostic evaluation with medical services.
Can CPT 90791 be used by a psychiatrist?
Yes, a psychiatrist may report 90791 when the service meets the code requirements and no medical services are included, but provider eligibility and payer-specific rules should always be verified.
Who can bill CPT 90792?
Providers who perform a psychiatric diagnostic evaluation that includes medical services. Because NCCI defines 90792 as an evaluation "with medical E&M," it is billed by clinicians licensed to provide medical services, such as psychiatrists and, where state scope of practice and the payer allow, psychiatric nurse practitioners and physician assistants. Psychologists, counselors and social workers use 90791. Exact eligibility varies by payer.
Can CPT 90791 and 90792 be billed on the same day?
They generally should not both be reported for the same psychiatric diagnostic evaluation. Separate services must meet coding and payer requirements before multiple codes are submitted. Under Medicare's NCCI policy, the same practitioner does not report either code with an E/M code or a psychotherapy code on the same date of service.
Are CPT 90791 and 90792 covered by Medicare?
Medicare recognizes both codes for psychiatric diagnostic evaluations, subject to its coverage, provider, documentation and billing requirements.
Can 90791 and 90792 be billed through telehealth?
Telehealth availability depends on current Medicare, Medicaid and commercial payer policies, as well as provider and service requirements. Always verify the payer's current telehealth rules before submitting a claim.
How can medical billing errors involving 90791 and 90792 be prevented?
Use the CPT code that reflects the service performed, keep complete documentation, verify payer-specific requirements, check provider eligibility, and review claims and denials regularly.