F20.3
BillableUndifferentiated schizophrenia
F20.3 is the ICD-10-CM code for Undifferentiated schizophrenia. It is a billable, specific code valid for reimbursement.
F01-F99 Mental, Behavioral and Neurodevelopmental disorders
What this means — in plain language
MedlinePlus · NIHSchizophrenia is a serious brain illness. People who have it may hear voices that aren't there. They may think other people are trying to hurt them. Sometimes they don't make sense when they talk. The disorder makes it hard for them to keep a job or take care of themselves. Symptoms of schizophrenia usually start between ages 16 and 30. Men often develop symptoms at a younger age than women. People usually do not…
Read more about Schizophrenia at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Includes
- •Atypical schizophrenia
Excludes1 — not coded here
- •acute schizophrenia-like psychotic disorder (F23)
Excludes2 — not included here
- •post-schizophrenic depression (F32.89)
Frequently asked questions
- What is ICD-10 code F20.3?
- F20.3 is the ICD-10-CM code for "Undifferentiated schizophrenia". It falls under F01-F99 Mental, Behavioral and Neurodevelopmental disorders.
- Is F20.3 a billable code?
- Yes — F20.3 is a billable, specific ICD-10-CM code valid for reimbursement.
- What is excluded from F20.3?
- Excludes1 (not coded here): acute schizophrenia-like psychotic disorder (F23).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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