Mental health billing requires precise ICD-10-CM coding for diagnoses including depression, anxiety, PTSD, ADHD, and substance use disorders. This reference page lists the top diagnosis and procedure codes used by psychiatrists, psychologists, licensed clinical social workers, and mental health nurse practitioners across the United States.
F32.9 is Major depressive disorder, single episode, unspecified — the most commonly billed depression code. For recurrent episodes use F33.x. Always document severity (mild, moderate, severe) to code to the highest specificity.
What CPT code is used for a 60-minute therapy session?
90837 covers individual psychotherapy for 60 minutes. It reimburses at a higher rate than 90834 (45 min) and 90832 (30 min). Session duration must be documented in the clinical note.
Is F41.1 (GAD) different from F41.9?
Yes. F41.1 is Generalized Anxiety Disorder and is the specific, preferred code when the documentation supports GAD. F41.9 is a non-specific anxiety disorder code; use it only when the physician has not documented a specific anxiety type.
Can therapists bill 99213/99214?
E&M codes (99213/99214) may be billed by licensed physicians and nurse practitioners for psychiatric medication management visits. Non-prescribing therapists (LCSWs, LPCs) typically bill psychotherapy codes (9083x) instead.
How does OmniMD support mental health billing?
OmniMD’s Mental Health EHR integrates DSM-5 diagnosis mapping to ICD-10 codes and supports e-prescribing for psychiatric medications with built-in PDMP checks.
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