What is the ICD-10 code for Schizotypal disorder?

The ICD-10-CM code for Schizotypal disorder is F21 (fiscal year 2026). It is a billable diagnosis code.

What does ICD-10 code F21 mean?

F21 is the ICD-10-CM diagnosis code for Schizotypal disorder. Schizotypal disorder

Is F21 a billable ICD-10 code?

Yes, F21 is a billable ICD-10-CM code that can be used on medical claims.

What chapter is F21 in?

F21 is classified under Chapter 5: Mental, Behavioral and Neurodevelopmental disorders (F01-F99), Section F20-F29: Schizophrenia, schizotypal, delusional, and other non-mood psychotic disorders (F20-F29).

What are the includes and excludes for F21?

Excludes2 (not included here): Asperger's syndrome (F84.5); schizoid personality disorder (F60.1).

F21 Schizotypal disorder

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The ICD-10-CM code for Schizotypal disorder is F21 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter: 5: Mental, Behavioral and Neurodevelopmental disorders (F01-F99)
Section: F20-F29: Schizophrenia, schizotypal, delusional, and other non-mood psychotic disorders (F20-F29)
Category F21: 1 code (1 billable)
FY2026 Status: Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to F21:

Schizophrenia, schizophrenic › latent
Disorder (of) › schizotypal (personality)
Schizophrenia, schizophrenic › pseudoneurotic
Schizophrenia, schizophrenic › pseudopsychopathic
Schizophrenia, schizophrenic › incipient
Schizophrenia, schizophrenic › prepsychotic
Schizophrenia, schizophrenic › prodromal
Schizophrenia, schizophrenic › borderline

Excludes2

Not included here. These conditions are coded elsewhere but may be coded together if applicable.

Asperger's syndrome (F84.5)
schizoid personality disorder (F60.1)

Inclusion Terms

Borderline schizophrenia
Latent schizophrenia
Latent schizophrenic reaction
Prepsychotic schizophrenia
Prodromal schizophrenia
Pseudoneurotic schizophrenia
Pseudopsychopathic schizophrenia
Schizotypal personality disorder

U.S. Hospital Utilization

An estimated 1,940 U.S. inpatient stays in 2023 included F21 among the documented diagnoses.
195 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Pain disorders related to psychological factors (TOC entry)

a. Pain disorders related to psychological factors ..................................................................... 43

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.5.a

Psychoactive substance use disorders (TOC entry)

b. Mental and behavioral disorders due to psychoactive substance use ................................... 43

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.5.b

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026