2026 ICD-10-CM Diagnosis Code F22

Code attributes

• Non-billable/Non-specific code

Coding rules

• Specify the leaf code — the parent code (e.g. F32) is a navigational header; billing requires a leaf code (F32.0, F32.1, etc.) that matches the documented presentation.
• Document onset, course, and severity (mild / moderate / severe) plus functional impact. Payers use this combination when adjudicating medical necessity.
• Attach a validated instrument score (PHQ-9, GAD-7, PCL-5, or equivalent) at intake and at follow-up where applicable. Objective measures support code selection and continued authorization.
• Review at every visit and update if presentation changes — including remission and partial remission states.

Clinical information

F22 codes delusional disorders — the presence of one or more delusions for a month or longer in the absence of other prominent psychotic symptoms. Functioning outside the delusion is usually preserved. Document the delusional theme (persecutory, grandiose, jealous, erotomanic, somatic, mixed) and any associated mood symptoms.