ICD-10-CM 2027
ICD-10 code for atypical form schizophrenia
From the official ICD-10-CM alphabetic index entry “Schizophrenia, schizophrenic › atypical (form)”. Page updated September 29, 2026.
About coding atypical form schizophrenia
The ICD-10-CM code for atypical form schizophrenia is F20.3 (Undifferentiated schizophrenia).
Within F20 (schizophrenia), F20.3 is specifically for Undifferentiated schizophrenia. Related codes cover paranoid schizophrenia (F20.0), Disorganized schizophrenia (F20.1), Catatonic schizophrenia (F20.2), residual schizophrenia (F20.5), other schizophrenia (F20.8) and unspecified (F20.9).
Don't report F20.3 together with the conditions in its Excludes1 note: acute schizophrenia-like psychotic disorder (F23).
The conditions in its Excludes2 note aren't part of F20.3, but may be coded alongside it if the patient has both: post-schizophrenic depression (F32.89).
Don't confuse with (Excludes1 for F20.3)
- acute schizophrenia-like psychotic disorder (F23)
Common questions about atypical form schizophrenia ICD-10 codes
What is the ICD-10 code for atypical form schizophrenia?
- F20.3 — Undifferentiated schizophrenia.
Is F20.3 billable?
- Yes. F20.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can F20.3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict F20.3 as a principal diagnosis.
Is F20.3 a CC or MCC?
- No. F20.3 is neither a CC nor an MCC under MS-DRG v44.0.