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If you bill insurance or issue superbills, learning the right CPT codes for psychologists isn't optional—it's what determines whether your claims get paid on the first pass. Psychologist CPT codes tell payers exactly what service you provided, from a 45-minute therapy session to a full day of testing. Pair the wrong code with the wrong diagnosis, and you're looking at a denial, a delay, or an audit request.
This guide walks through the CPT codes for psychologists you'll use most, breaks down testing and evaluation codes separately from psychotherapy codes, and covers the ICD-10 psychology codes that pair with them so your claims hold up. By the end, you'll have a working reference for the CPT codes for psychologists that show up most often in outpatient practice.
What are CPT codes for psychologists, exactly?
Current Procedural Terminology, or CPT, codes are five-digit codes maintained by the American Medical Association that describe a specific health care service. Payers use them to figure out what happened in a session and how much to pay for it.
Psychologist CPT codes aren't a separate coding system from the ones psychiatrists, licensed clinical social workers, and other licensed clinicians use. Psychologists, psychiatrists, nurses, and social workers who deliver psychotherapy all draw from the same set of CPT codes when billing Medicare, Medicaid, and private insurers. What sets psychologist CPT codes apart is scope: the psychological and neuropsychological testing evaluation codes (96130–96133) can generally only be billed by a licensed psychologist or neuropsychologist, not by other mental health clinicians.
Every CPT code you bill needs a matching ICD-10 diagnosis code on the claim to establish medical necessity. We'll cover that pairing later on, but keep it in mind as you read through the CPT codes for psychologists below.
What are the most common psychologist CPT codes for psychotherapy?
The psychotherapy codes are the workhorses of most psychology practices. They're time-based, meaning the code you bill depends on session length, not the modality you used:
90791: Psychiatric diagnostic evaluation without medical services (the standard intake session)
90832: Individual psychotherapy, 16–37 minutes
90834: Individual psychotherapy, 38–52 minutes
90837: Individual psychotherapy, 53 minutes or more
90846: Family psychotherapy without the patient present
90847: Family or couples psychotherapy with the patient present
90853: Group psychotherapy
90839: Psychotherapy for crisis, first 60 minutes
90840: Psychotherapy for crisis, each additional 30 minutes (add-on to 90839)
90785: Interactive complexity (add-on code for sessions complicated by factors like an uncooperative caregiver or a young child)
Of these psychologist CPT codes, 90834 and 90837 see the most use in private practice, since most individual sessions run 45 to 60 minutes. Document your actual start and stop times for every session. If a payer audits your claims, that documentation is what proves the code you billed matches the service you delivered. For a deeper breakdown of session-length codes and add-ons, see this guide to psychotherapy CPT codes.
What's the CPT code for psychological testing?
Among the CPT codes for psychologists, the CPT code for psychological testing tends to cause the most confusion, mostly because it isn't a single code. Testing services are split into two categories, and psychologists typically bill from both:
96130: Psychological testing evaluation services, first hour (interpreting results, integrating data, treatment planning, and report writing)
96131: Psychological testing evaluation services, each additional hour (add-on to 96130)
96136: Test administration and scoring by the psychologist, first 30 minutes
96137: Test administration and scoring by the psychologist, each additional 30 minutes (add-on to 96136)
96138 and 96139: The same administration and scoring services, but performed by a supervised technician instead of the psychologist
96146: A single automated instrument administered via computer, with no administration or scoring time involved
Evaluation services should always be billed alongside test administration services, since the evaluation codes include the professional work of selecting which tests to give. If you're doing a neuropsychological evaluation instead of a general psychological one, swap in 96132 and 96133 for the evaluation portion. The administration codes (96136–96139) stay the same either way.
For more detail on this code family, see this overview of CPT codes for psychological testing.
What's the psychological evaluation CPT code?
This is another spot where the CPT codes for psychologists get mixed up, because "evaluation" means two different things depending on context. The psychological evaluation CPT code could refer to:
90791, the psychiatric diagnostic evaluation used for a standard intake session with no formal testing involved
96130, the psychological testing evaluation code used specifically for interpreting and reporting on standardized test results
If your session involves a clinical interview, a history, and a treatment plan, but no standardized tests, you're billing 90791. If it involves administering measures like an intelligence test or a personality inventory and writing up the results, you're in 96130 territory.
Billing 90791 and a full testing battery on the same date for the same patient is a common red flag for payers, so most practices schedule the diagnostic evaluation and the testing sessions on separate dates.
What other psychology CPT codes should be on your radar?
Beyond psychotherapy and testing, the list of CPT codes for psychologists includes a few other psychology CPT codes that come up regularly in private practice:
96156: Health behavior assessment or reassessment, used when a psychologist addresses the psychological, behavioral, or social factors affecting a physical health condition rather than treating a mental health diagnosis directly
96158 and 96159: Individual health behavior intervention, first 30 minutes and each additional 15 minutes
96164 and 96165: The same intervention delivered in a group format
These codes matter for psychologists working alongside medical teams—think chronic pain management, diabetes care, or presurgical clearance—where the primary diagnosis is a physical health ICD-10 code rather than a mental health one.
You'll also want a telehealth modifier on file for virtual sessions: modifier 95 for synchronous audio-video visits and modifier 93 for audio-only sessions, both of which apply across the psychologist CPT codes listed above.
What are the ICD-10 psychology codes psychologists bill most?
CPT codes for psychologists explain what service you provided. ICD-10 psychology codes explain why. Payers need both on a claim to determine medical necessity, and the diagnosis has to reasonably justify the intensity of the service.
A few ICD-10 psychology codes show up across most caseloads:
F41.1: Generalized anxiety disorder
F32.0–F32.9: Major depressive disorder, single episode (by severity)
F33.0–F33.9: Major depressive disorder, recurrent episode (by severity)
F43.10: Post-traumatic stress disorder, unspecified
F43.20–F43.29: Adjustment disorders (by predominant symptom)
F90.0–F90.9: Attention-deficit/hyperactivity disorder (by presentation)
Unspecified codes like F41.9 and F32.9 are billable, but they hold up better for a session or two while you're still assessing than as a long-term diagnosis. Once your documentation supports a more specific ICD-10 psychology code, update it.
That specificity also matters for testing claims, since a testing evaluation billed under a vague diagnosis is more likely to draw a request for additional records than one tied to a clearly documented presenting problem.
For a longer reference list, check out this mental health ICD-10 codes cheat sheet.
How do CPT and ICD-10 codes work together on a claim?
Every claim form pairs a CPT code with at least one ICD-10 code, and the diagnosis needs to support the service. A 60-minute psychotherapy session (90837) paired with generalized anxiety disorder (F41.1) tells a clean, medically necessary story. That same CPT code paired with a mild, unspecified diagnosis and no supporting documentation is more likely to get flagged.
This is also where a lot of psychologists run into trouble with testing claims specifically. Because testing evaluation codes and administration codes can span multiple dates of service, it's worth keeping a running log of which ICD-10 code justifies each stage of the evaluation, from the initial referral question through the feedback session.
That way, whenever the full battery of psychologist CPT codes for a case gets submitted, the diagnosis code on file matches what your documentation actually supports. If you provide out-of-network care, this same CPT-to-ICD-10 pairing is exactly what belongs on a superbill for therapy.
Getting comfortable with CPT codes for psychologists takes some repetition, but the pattern holds across your caseload: match the code to the actual time and service delivered, document accordingly, and pair it with the most specific ICD-10 code your assessment supports.
An EHR built for behavioral health, like SimplePractice, can also flag mismatched code pairings before a claim goes out the door.
Sources
American Medical Association. (2025). Behavioral health coding guide.
American Psychological Association. (n.d.). CPT and diagnostic codes.
Owings-Fonner, N. (2019). Psychologists' testing codes have changed. American Psychological Association.
Centers for Medicare & Medicaid Services. (n.d.). Billing and coding: Psychiatric codes (A57130).
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