F28 — Other psychotic disorder not due to a substance or known physiological condition
F28 is a billable, specific ICD-10-CM code for other psychotic disorder not due to a substance or known physiological condition. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Chronic hallucinatory psychosis
- Other specified schizophrenia spectrum and other psychotic disorder
Risk adjustment
F28 risk-adjusts. Under the CMS-HCC V28 model it maps to these categories:
- HCC 152 Psychosis, Except Schizophrenia0.484 RAF
- HCC 152 Psychosis, Except Schizophrenia0.484 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
F28 is named in 20 Medicare coverage policies — 19 listing it as supporting medical necessity, and 1 listing it as NOT covered. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52434Health and Behavior Assessment/Intervention – Medical Policy Articlenot covered
- A56612Billing and Coding: CT of the Head
- A56614Billing and Coding: Psychiatric Inpatient Hospitalization
- A56645Billing and Coding: Controlled Substance Monitoring and Drugs of Abuse Testing
How F28 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to F28.
- Hallucinosis(chronic)
- Insanity, insane›confusional
- Menopause, menopausal›psychosis NEC
- Psychosis, psychotic›hallucinatory, chronic
- Psychosis, psychotic›involutional
- Disorder›schizophrenia spectrum and other psychotic disorder›specified NEC
- Psychosis, psychotic›nonorganic›specified NEC
- Schizophrenia, schizophrenic›spectrum and other psychotic disorder›specified NEC
Questions about F28
- Is F28 a billable ICD-10-CM code?
- Yes. F28 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does F28 sit in the tabular list?
- Mental, Behavioral and Neurodevelopmental disorders (F01-F99), in the block Schizophrenia, schizotypal, delusional, and other non-mood psychotic disorders (F20-F29).