Schizotypal disorder (F21) ICD-10-CM
The F21 code range covers schizotypal disorder with 1 ICD-10-CM diagnosis codes. 1 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- Borderline schizophrenia
- Latent schizophrenia
- Latent schizophrenic reaction
- Prepsychotic schizophrenia
- Prodromal schizophrenia
- Pseudoneurotic schizophrenia
- Pseudopsychopathic schizophrenia
- Schizotypal personality disorder
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Codes in the F21 Range 1 codes · 1 billable
- F21 Schizotypal disorder
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the F21 range.
Schizotypal Personality Disorder
A personality disorder in which there are oddities of thought (magical thinking, paranoid ideation, suspiciousness), perception (illusions, depersonalization), speech (digressive, vague, overelaborate), and behavior (inappropriate affect in social interactions, frequently social isolation) that are not severe enough to characterize schizophrenia.
About the F21 Code Range
The ICD-10 code F21 is used exclusively for identifying schizotypal disorder, a personality disorder that falls within the schizophrenia spectrum. This code helps distinguish this condition from other mental health diagnoses in clinical and billing contexts.
Schizotypal disorder—also known by synonyms such as latent schizophrenia, schizophrenic prodrome, or schizotypal personality disorder—is characterized by peculiar thoughts and behaviors that may resemble schizophrenia but without full psychosis. The ICD-10 code F21 specifically captures this unique set of symptoms and traits that differ from schizophrenia in remission or other personality disorders. Using this code ensures accurate documentation for patients who exhibit these distinctive Cluster A personality disorder features, guiding proper treatment planning and resource allocation. When searching for the ICD-10 code for schizotypal disorder, F21 is the definitive classification to use in medical coding and healthcare records.
Questions About This Page
How many billable codes are in the F21 range?
Of the 1 codes in this range, 1 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the F21 range classify?
The range classifies schizotypal disorder. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
