ICD-10 Code F22 – Delusional disorders (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F22 – Delusional disorders
What it is
F22 identifies a psychotic disorder marked by persistent delusions that are not better explained by schizophrenia, mood disorder with psychotic features, or a medical condition. The person’s thinking may otherwise remain relatively organized.
Clinical signs
Common findings include fixed false beliefs that are held despite clear evidence to the contrary. Clinical features vary; refer to documentation. Hallucinations, if present, are usually not prominent and the person may function fairly well outside the delusional topic.
When to use this code
Use F22 when the record documents a delusional disorder or persistent delusions as the primary diagnosis. Apply it when the clinician distinguishes the condition from schizophrenia, substance-induced psychosis, or a mood disorder with psychotic features. Check documentation if the diagnosis is unclear.
Do not use for
Do not use F22 for delusions caused by substances, a medical condition, or a mood disorder with psychotic features. Also avoid it when documentation supports schizophrenia or another psychotic disorder instead.
Coding tip
Confirm the provider explicitly names delusional disorder or persistent delusions before assigning F22.