F20.1 ICD-10-CM

ICD-10-CM code F20.1 describes disorganized schizophrenia. Schizophrenia with prominent thought disorder, disorganized speech/behavior, and flat or inappropriate affect. It is a billable, specific code valid for claim submission. It is grouped under the “Schizophrenia Spectrum & Psychotic Disorders” section of the mental, behavioral, and neurodevelopmental disorders chapter.

When to use F20.1

Use this group for schizophrenia, schizoaffective disorder, delusional disorder, brief psychotic disorder, and other non-substance psychoses. Choose the subtype and current-state modifiers that the documentation supports. For F20.1 specifically, schizophrenia with prominent thought disorder, disorganized speech/behavior, and flat or inappropriate affect.

Documentation & billing

Document the subtype, the presence of psychotic features, and the current episode state. Confirm the psychosis is not substance-induced or due to a medical condition before assigning an F20–F29 code.

Common pitfalls

• Using unspecified psychosis (F29) when criteria for a specific disorder are met.
• Failing to distinguish schizoaffective disorder from schizophrenia with mood symptoms.
• Coding substance-induced or medical-condition psychosis under F20–F29.

Common search terms for F20.1

Clinicians often look up F20.1 using plain-language terms. This code maps to:

Frequently asked questions