ICD-10 F21: Schizotypal disorder

Formerly DSM-5 301.22 — Schizotypal Personality Disorder. Both codes describe the same diagnosis; ICD-10 F21 is the one an insurer expects on a superbill.

Using ICD-10 F21 on a Superbill

ICD-10 code F21 (Schizotypal disorder) is a schizophrenia spectrum code used on superbills for mental health therapy billing. Insurance companies require at least one ICD-10 code per superbill to process a reimbursement claim.

CPT Codes Commonly Used With F21

Common CPT codes paired with ICD-10 F21 include 90837 (60-min psychotherapy), 90834 (45-min psychotherapy), and 90791 (initial psychiatric evaluation). The CPT code reflects the service rendered, not the diagnosis.

Clinical Criteria

Pervasive pattern of social and interpersonal deficits marked by acute discomfort with close relationships, cognitive or perceptual distortions, and eccentricities of behavior. ≥5 of: ideas of reference, odd beliefs/magical thinking, unusual perceptual experiences, odd thinking/speech, suspiciousness, inappropriate affect, odd/eccentric behavior, lack of close friends, excessive social anxiety. Onset in early adulthood.

DSM-5 Cross-Reference

DSM-5 301.22 — Schizotypal Personality Disorder

Common CPT Pairings

CPT 90837 - 60-min psychotherapy CPT 90834 - 45-min psychotherapy CPT 90791 - Psychiatric evaluation

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