F21
✓ Billable
Schizotypal disorder
ICD-10-CM · FY2026 · Mental, Behavioral and Neurodevelopmental Disorders
Code
F21
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Mental, Behavioral and Neurodevelopmental Disorders
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Also known as
- Borderline schizophrenia
- Latent schizophrenia
- Latent schizophrenic reaction
- Prepsychotic schizophrenia
- Prodromal schizophrenia
- Pseudoneurotic schizophrenia
- Pseudopsychopathic schizophrenia
- Schizotypal personality disorder
Excludes2 — not included here, but may code together
- Asperger's syndrome (F84.5)
- schizoid personality disorder (F60.1)
Frequently asked questions
What is ICD-10 code F21?
ICD-10-CM code F21 represents Schizotypal disorder. It is a billable diagnosis code in the Mental, Behavioral and Neurodevelopmental Disorders chapter, effective October 1, 2025 – September 30, 2026.
Is F21 billable?
Yes. F21 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is F21 in?
F21 belongs to the Mental, Behavioral and Neurodevelopmental Disorders chapter (F01–F99) of ICD-10-CM.
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