F28

ICD-10Billable

Oth psych disorder not due to a sub or known physiol cond

Official ICD-10-CM descriptor (FY2026)

Other psychotic disorder not due to a substance or known physiological condition

F28 is valid for submission on a claim: CMS flags it as a billable, specific code.

Inclusion terms

Chronic hallucinatory psychosis
Other specified schizophrenia spectrum and other psychotic disorder

Where this code sits

Chapter: 5. Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
Block: Schizophrenia, schizotypal, delusional, and other non-mood psychotic disorders (F20-F29)

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.