Mental Health ICD-10 Codes

These are the ICD-10-CM diagnosis codes therapists bill most often, with the official FY2027 description, the DSM-5-TR name it crosswalks to, and a page per code with coding notes and what to document for medical necessity. The diagnosis code goes on the claim next to the CPT code for the service.

Depressive disorders

Depression codes split by whether this is a single episode (F32) or recurrent (F33), then by severity and remission status. Persistent depressive disorder sits in F34.

Code	Official description	DSM-5-TR name
F32.0	Major depressive disorder, single episode, mild	Major depressive disorder, single episode, mild
F32.1	Major depressive disorder, single episode, moderate	Major depressive disorder, single episode, moderate
F32.2	Major depressive disorder, single episode, severe without psychotic features	Major depressive disorder, single episode, severe
F32.9	Major depressive disorder, single episode, unspecified	Major depressive disorder, single episode, unspecified
F32.A	Depression, unspecified	Unspecified depressive disorder
F33.0	Major depressive disorder, recurrent, mild	Major depressive disorder, recurrent episode, mild
F33.1	Major depressive disorder, recurrent, moderate	Major depressive disorder, recurrent episode, moderate
F33.2	Major depressive disorder, recurrent severe without psychotic features	Major depressive disorder, recurrent episode, severe
F33.9	Major depressive disorder, recurrent, unspecified	Major depressive disorder, recurrent episode, unspecified
F34.1	Dysthymic disorder	Persistent depressive disorder

Anxiety and obsessive-compulsive disorders

Anxiety codes live in F40 (phobic anxiety disorders) and F41 (other anxiety disorders). Obsessive-compulsive disorder has its own category, F42.

Code	Official description	DSM-5-TR name
F41.1	Generalized anxiety disorder	Generalized anxiety disorder
F41.0	Panic disorder [episodic paroxysmal anxiety]	Panic disorder
F41.9	Anxiety disorder, unspecified	Unspecified anxiety disorder
F40.10	Social phobia, unspecified	Social anxiety disorder
F42.2	Mixed obsessional thoughts and acts	Obsessive-compulsive disorder

Trauma and stress-related disorders

F43 covers reactions to severe stress. PTSD is F43.1-, acute stress reaction is F43.0, and F43.8- holds prolonged grief disorder and other specified stress reactions.

Code	Official description	DSM-5-TR name
F43.10	Post-traumatic stress disorder, unspecified	Posttraumatic stress disorder
F43.0	Acute stress reaction	Acute stress disorder
F43.81	Prolonged grief disorder	Prolonged grief disorder
F43.89	Other reactions to severe stress	Other specified trauma- and stressor-related disorder

Adjustment disorders

Adjustment disorders are F43.2-, with the sixth character naming the main presentation: depressed mood, anxiety, both, or a disturbance of conduct.

Code	Official description	DSM-5-TR name
F43.20	Adjustment disorder, unspecified	Adjustment disorder, unspecified
F43.21	Adjustment disorder with depressed mood	Adjustment disorder, with depressed mood
F43.22	Adjustment disorder with anxiety	Adjustment disorder, with anxiety
F43.23	Adjustment disorder with mixed anxiety and depressed mood	Adjustment disorder, with mixed anxiety and depressed mood
F43.24	Adjustment disorder with disturbance of conduct	Adjustment disorder, with disturbance of conduct
F43.25	Adjustment disorder with mixed disturbance of emotions and conduct	Adjustment disorder, with mixed disturbance of emotions and conduct

ADHD

ADHD codes are F90.-, split by presentation: predominantly inattentive, predominantly hyperactive-impulsive, or combined.

Code	Official description	DSM-5-TR name
F90.0	Attention-deficit hyperactivity disorder, predominantly inattentive type	Attention-deficit/hyperactivity disorder, predominantly inattentive presentation
F90.2	Attention-deficit hyperactivity disorder, combined type	Attention-deficit/hyperactivity disorder, combined presentation
F90.9	Attention-deficit hyperactivity disorder, unspecified type	Unspecified attention-deficit/hyperactivity disorder

Bipolar and personality disorders

Bipolar disorders are F31.- and specific personality disorders are F60.-. Therapists often treat these alongside a psychiatrist or other prescriber.

Code	Official description	DSM-5-TR name
F31.81	Bipolar II disorder	Bipolar II disorder
F60.3	Borderline personality disorder	Borderline personality disorder

Z codes for relational and psychosocial problems

Z codes describe circumstances that affect care, not mental disorders. They are valid codes, but many payers will not reimburse psychotherapy when a Z code is the only diagnosis.

Code	Official description	DSM-5-TR name
Z63.0	Problems in relationship with spouse or partner	Relationship distress with spouse or intimate partner

All codes listed are billable and were verified against the FY2027 ICD-10-CM code set (CDC/NCHS and CMS), effective October 1, 2026 - September 30, 2027, on Oct 12, 2026. Official descriptions are reproduced verbatim.

Putting a claim together? The free superbill generator takes your ICD-10 and CPT codes and builds a superbill your client can submit for out-of-network reimbursement.

Frequently asked questions

What are the most common ICD-10 codes for therapists?

Across outpatient therapy the codes that come up most are F41.1 (generalized anxiety disorder), F41.9 (anxiety disorder, unspecified), F32.A (depression, unspecified), F33.1 (major depressive disorder, recurrent, moderate), F43.10 (PTSD), the adjustment disorder codes F43.21-F43.23, and F90.0 or F90.2 for ADHD.

What is the difference between ICD-10 and CPT codes?

ICD-10-CM codes describe the diagnosis - why you are treating the client. CPT codes describe the service - what you did, such as a 90837 psychotherapy session. A claim needs both.

Do DSM-5-TR diagnoses use ICD-10 codes?

Yes. DSM-5-TR lists an ICD-10-CM code for each diagnosis, and that ICD-10-CM code is what goes on the claim. The DSM name and the official ICD-10-CM description sometimes differ, such as persistent depressive disorder, which codes to F34.1 (Dysthymic disorder).

When do ICD-10 codes change?

ICD-10-CM updates every October 1, at the start of the federal fiscal year, and occasionally on April 1. The FY2027 code set is effective October 1, 2026 - September 30, 2027. Mental health codes change less often than most, but codes like F32.A (2021) and F43.81 (2022) are recent additions.

Can I bill insurance with a Z code?

Z codes such as Z63.0 are valid ICD-10-CM codes, but many payers will not reimburse psychotherapy when a Z code is the only diagnosis. They are often used alongside an F code to describe circumstances that affect care.

A coding reference, not clinical, diagnostic, billing, or legal advice. The diagnosis is the treating clinician's call - always confirm against the current ICD-10-CM code set and official guidelines and your payer's policy.