ICD-10 F09
ICD-10 F09: Unspecified mental disorder due to known physiological condition
Category
Organic mental disorders
Code Type
Mental health diagnosis
Using ICD-10 F09 on a Superbill
ICD-10 code F09 (Unspecified mental disorder due to known physiological condition) is a organic mental disorders 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 F09
Common CPT codes paired with ICD-10 F09 include 90837 (60-min psychotherapy), 90834 (45-min psychotherapy), and 90791 (initial psychiatric evaluation). The CPT code reflects the service rendered, not the diagnosis.