ICD-10 Code F20.1 – Disorganized Schizophrenia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code F20.1 – Disorganized schizophrenia
What it is
Use this code for schizophrenia characterized by prominent disorganized speech, disorganized behavior, and flat or inappropriate affect. It reflects a schizophrenia subtype documented as disorganized or hebephrenic.
Clinical signs
Typical findings include incoherent or tangential speech, odd behavior, and marked difficulty organizing thoughts. Negative symptoms may appear, and clinical features can vary; refer to documentation.
When to use this code
Use F20.1 when the provider specifically documents disorganized schizophrenia or hebephrenic schizophrenia. Apply it when the record supports schizophrenia with dominant disorganization rather than another schizophrenia subtype. If the note is unclear, check documentation.
Do not use for
Do not use this code for brief psychotic disorder, schizoaffective disorder, or schizophrenia type not specified as disorganized. If the diagnosis is not clearly documented, do not assume F20.1.
Coding tip
Code only when the clinician’s wording clearly supports disorganized schizophrenia; otherwise, query for the exact schizophrenia subtype.