F20.3 Undifferentiated schizophrenia

BillableCMS-HCC V28: HCC 151age >= 20151age < 20Chapter 5

Check coverage with this diagnosis

Instructional notes

Chapter 5

Excludes2Not included here: the patient may have both; report both when both are present.

symptoms, signs and abnormal clinical laboratory findings, not elsewhere classified (R00-R99)

Includes

disorders of psychological development

F20

Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.

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)

Excludes2Not included here: the patient may have both; report both when both are present.

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 codeAdd a second code for the full picture.

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

This code

Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.

acute schizophrenia-like psychotic disorder (F23)

Excludes2Not included here: the patient may have both; report both when both are present.

post-schizophrenic depression (F32.89)

Inclusion terms

Atypical schizophrenia

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

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.