ICD-10 Code F20 – Schizophrenia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F20 – Schizophrenia
What it is
Schizophrenia is a chronic psychotic disorder marked by disturbances in thinking, perception, and behavior. Use this code for documented schizophrenia when the record identifies the condition without a more specific subtype.
Clinical signs
Common findings include delusions, hallucinations, disorganized speech, and impaired social or occupational functioning. Clinical features vary; refer to documentation.
When to use this code
Use F20 when the provider documents schizophrenia and does not specify a more detailed category, such as a subtype or episode pattern. It may also apply when the chart clearly states schizophrenia as the active diagnosis being managed or evaluated.
Check the note for supporting psychiatric assessment, history, and current symptoms. If the documentation names a different psychotic disorder or a substance-induced condition, do not default to F20.
Do not use for
Do not use F20 for brief psychotic episodes, schizoaffective disorder, or psychosis clearly linked to substances or another medical condition. Check documentation.
Coding tip
Code the most specific documented psychotic diagnosis; if schizophrenia is unclear or mixed with another disorder, query the provider.