ICD-10 F21
ICD-10 F21: Schizotypal disorder
Category
Schizophrenia spectrum
Code Type
Mental health diagnosis
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.