F20.3 – Undifferentiated schizophrenia

ICD-10-CM 2027 diagnosis code · Schizophrenia, schizotypal, delusional, and other non-mood psychotic disorders

Billable code

ICD-10-CM code F20.3

Code: F20.3 (claims format: F203)
Description: Undifferentiated schizophrenia
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 5. Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
Block: F20-F29 Schizophrenia, schizotypal, delusional, and other non-mood psychotic disorders
Parent codes: F20

Notes for F20.3

Applicable to:

Atypical schizophrenia

Excludes1 (not coded here):

acute schizophrenia-like psychotic disorder (F23)

Excludes2 (not included here):

post-schizophrenic depression (F32.89)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

F20 – Schizophrenia

Excludes1 (not coded here):

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-)

Index terms for F20.3

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in F20

F20.0 – Paranoid schizophreniaBillable
F20.1 – Disorganized schizophreniaBillable
F20.2 – Catatonic schizophreniaBillable
F20.5 – Residual schizophreniaBillable
F20.8 – Other schizophreniaHeader
F20.9 – Schizophrenia, unspecifiedBillable

Frequently asked questions

What is ICD-10 code F20.3?

F20.3 is the ICD-10-CM code for undifferentiated schizophrenia, in the block F20-F29 (Schizophrenia, schizotypal, delusional, and other non-mood psychotic disorders).

Is F20.3 a billable code?

Yes. F20.3 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does F20.3 belong to?

It belongs to category F20 – Schizophrenia.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.