Other psychotic disorder not due to a substance or known physiological condition (F28) ICD-10-CM
The F28 code range covers other psychotic disorder not due to a substance or known physiological condition with 1 ICD-10-CM diagnosis codes. 1 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- Chronic hallucinatory psychosis
- Other specified schizophrenia spectrum and other psychotic disorder
Codes in the F28 Range 1 codes · 1 billable
- F28 Other psychotic disorder not due to a substance or known physiological condition
About the F28 Code Range
ICD-10 code F28 is used for diagnosing psychotic disorders that are not caused by substance use or other known physical health issues. It identifies conditions where psychosis occurs independently without a clear physiological or drug-related trigger.
This code covers disorders such as hallucinosis, a condition involving persistent hallucinations without the broader impairments seen in schizophrenia. By assigning F28, healthcare providers can specify that the psychotic symptoms arise from a psychiatric origin rather than substances or medical conditions. Using the term "other psychotic disorder not due to a substance or known physiological condition" helps clarify the diagnosis when symptoms don't fit more common psychotic disorders like schizophrenia. This makes it an important code for medical coders looking for the appropriate ICD-10 code for hallucinosis or similar psychotic presentations.
Questions About This Page
How many billable codes are in the F28 range?
Of the 1 codes in this range, 1 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the F28 range classify?
The range classifies other psychotic disorder not due to a substance or known physiological condition. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
