F20.3 Undifferentiated schizophrenia

Billable ICD-10-CM code, FY2026.

Applicable to

• Atypical schizophrenia

Excludes1 (never code together)

• acute schizophrenia-like psychotic disorder (F23)

Excludes2 (not included here)

• post-schizophrenic depression (F32.89)

Applies from F20 Schizophrenia

Excludes1 (never code together)

• brief psychotic disorder (F23)
• cyclic schizophrenia (F25.0)
• mood [affective] disorders with psychotic symptoms (F30.2, F31.2, F31.5, F31.64, F32.3, F33.3)
• schizoaffective disorder (F25.-)
• schizophrenic reaction NOS (F23)

Excludes2 (not included here)

• schizophrenic reaction in:
• alcoholism (F10.15-, F10.25-, F10.95-)
• brain disease (F06.2)
• epilepsy (F06.2)
• psychoactive drug use (F11-F19 with .15. .25, .95)
• schizotypal disorder (F21)

Use additional code

• code, if applicable, to identify:
• other specified cognitive deficit (R41.84-)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 151 — Schizophrenia
• CMS-HCC V22: HCC 57 — Schizophrenia
• RxHCC V08: HCC 130 — Schizophrenia and Other Psychosis
• ESRD V24: HCC 57

MS-DRG index

Defines the logic of DRG(s) 885 in MDC 19.

Approximate ICD-9-CM (GEMs)

• 295.90 Unspecified schizophrenia, unspecified (approximate)

Code annotations containing back-references to F20.3

Back-references to F20

• Type 2 Excludes: F06.0 Psychotic disorder with hallucinations due to known physiological condition ("schizophrenia (F20.-)")
• Type 2 Excludes: F06.2 Psychotic disorder with delusions due to known physiological condition ("schizophrenia (F20.-)")
• Type 1 Excludes: F25 Schizoaffective disorders ("schizophrenia (F20.-)")
• Type 2 Excludes: F42 Obsessive-compulsive disorder ("obsessive-compulsive symptoms occurring in schizophrenia (F20.-)")
• Type 1 Excludes: F53 Mental and behavioral disorders associated with the puerperium, not elsewhere classified ("psychosis in schizophrenia, schizotypal, delusional, and other psychotic disorders (F20-F29)")
• Type 2 Excludes: F60.1 Schizoid personality disorder ("schizophrenia (F20.-)")
• Type 2 Excludes: F63.1 Pyromania ("schizophrenia (F20.-)")
• Type 2 Excludes: F90 Attention-deficit hyperactivity disorders ("schizophrenia (F20.-)")
• Type 2 Excludes: F91 Conduct disorders ("schizophrenia (F20.-)")
• Type 2 Excludes: F94.0 Selective mutism ("schizophrenia (F20.-)")
• Code First: R41.84 Other specified cognitive deficit ("schizophrenia (F20.-)")
• Type 1 Excludes: R44 Other symptoms and signs involving general sensations and perceptions ("hallucinations in schizophrenia, schizotypal and delusional disorders (F20-F29)")
• Type 1 Excludes: R46 Symptoms and signs involving appearance and behavior ("appearance and behavior in schizophrenia, schizotypal and delusional disorders (F20-F29)")

Diagnosis Index entries for F20.3

• Schizophrenia, schizophrenic › atypical (form)
• Schizophrenia, schizophrenic › undifferentiated (type)

Nearby codes

• F20 Schizophrenia
• F20.0 Paranoid schizophrenia
• F20.1 Disorganized schizophrenia
• F20.2 Catatonic schizophrenia
• F20.3 Undifferentiated schizophrenia (this code)
• F20.5 Residual schizophrenia
• F20.8 Other schizophrenia
• F20.81 Schizophreniform disorder
• F20.89 Other schizophrenia
• F20.9 Schizophrenia, unspecified