ICD-10-CM 2027
ICD-10 code for delusional disorder
From the official ICD-10-CM alphabetic index entry “Disorder (of) › delusional (persistent) (systematized)”. Page updated September 29, 2026.
About coding delusional disorder
The ICD-10-CM code for delusional disorder is F22 (Delusional disorders). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on F22.
Don't report F22 together with the conditions in its Excludes1 note: mood [affective] disorders with psychotic symptoms (F30.2, F31.2, F31.5, F31.64, F32.3, F33.3) and paranoid schizophrenia (F20.0).
The conditions in its Excludes2 note aren't part of F22, but may be coded alongside it if the patient has both: paranoid personality disorder (F60.0), paranoid psychosis, psychogenic (F23) and paranoid reaction (F23).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific delusional disorder codes (official index)
- induced F24 — Shared psychotic disorder
Don't confuse with (Excludes1 for F22)
Common questions about delusional disorder ICD-10 codes
What is the ICD-10 code for delusional disorder?
- F22 — Delusional disorders. More specific codes apply when the documentation supports them: F24.
What is the ICD-10 code for induced delusional disorder?
- F24 — Shared psychotic disorder.
Is F22 billable?
- Yes. F22 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F22 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F22 as a principal diagnosis.
Is F22 a CC or MCC?
- No. F22 is neither a CC nor an MCC under MS-DRG v44.0.