ICD-10-CM Code For Schizotypal Disorder: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group F21 includes schizotypal disorder and related non-mood psychotic conditions characterized by pervasive social and interpersonal deficits, odd beliefs or magical thinking, and eccentric behavior. These ICD-10-CM diagnosis codes are used to document primary psychiatric presentations with enduring personality and perceptual disturbances, capturing clinical severity, functional impairment, and comorbid psychiatric complexity relevant to this group. Accurate coding within the ICD-10-CM F21 group supports complete clinical documentation and appropriate reimbursement.

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ICD-10-CM F21: Schizotypal Disorder Overview

The ICD-10-CM F21 group covers schizotypal disorder and related non-mood psychotic conditions affecting thought, perception, and interpersonal functioning. These diagnoses target primary psychiatric and behavioral domains rather than a specific organ system. Accurate coding matters for proper clinical documentation and can affect reimbursement and care coordination.

When to Use

Use a code from this group when a clinical assessment documents schizotypal personality features or a formal diagnosis of schizotypal disorder affecting functioning. Codes in this group are selected to reflect the diagnosis when it is the primary psychiatric condition or is significant to the treatment plan.

ICD-10-CM Codes

1 rows

ICD-10-CM Code	Description
F21	Schizotypal disorder

DRG Codes

1 rows

DRG Code	Description
883	Disorders of Personality and Impulse Control

Typical Clinical Scenarios

A young adult presents to outpatient psychiatry with long-standing pervasive social anxiety, odd beliefs, constricted affect, eccentric behavior, and transient psychotic-like experiences that do not meet criteria for schizophrenia. Symptoms began in adolescence, cause occupational and interpersonal impairment, and have been stable but persistent over years, prompting diagnostic clarification and ongoing psychotherapy/medication management. Typical codes: F21.
An emergency department evaluation for acute agitation and paranoid ideation in a middle-aged patient with no prior psychotic disorder reveals chronic odd speech, social isolation, and unusual perceptual experiences; after medical causes are ruled out and psychosis is judged non-bizarre and part of a longstanding personality-style disorder rather than primary schizophrenia, the diagnosis from this group is assigned for crisis disposition and follow-up planning. Typical codes: F21.
A primary care visit documents a patient with chronic difficulty forming relationships, eccentric behavior, and mild cognitive disorganization who presents for new-onset major depressive symptoms; the clinician codes the underlying personality/psychotic-spectrum condition to explain longstanding interpersonal dysfunction and to guide collaborative psychiatric care. Typical codes: F21.

Related Codes

F20-SCHIZOPHRENIA

ICD-10-CM Code For Schizophrenia: Group Overview

F22-DELUSIONAL-DISORDERS

ICD-10-CM Code For Delusional Disorders: Group Overview

F23-BRIEF-PSYCHOTIC-DISORDER

ICD-10-CM Code For Brief Psychotic Disorder: Group Overview

F24-SHARED-PSYCHOTIC-DISORDER

ICD-10-CM Code For Shared Psychotic Disorder: Group Overview

F25-SCHIZOAFFECTIVE-DISORDERS

ICD-10-CM Code For Schizoaffective Disorders: Group Overview

F28-OTHER-PSYCHOTIC-DISORDER

ICD-10-CM Code For Other Psychotic Disorder Not Due To A Substance Or Known Physiological Condition: Group Overview

F29-UNSPECIFIED-PSYCHOSIS-NOT-DUE-TO-A-SUBSTANCE

ICD-10-CM Code For Unspecified Psychosis Not Due To A Substance Or Known Physiological Condition: Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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When to Use

ICD-10-CM Codes

1 rows

ICD-10-CM Code	Description
F21	Schizotypal disorder

DRG Codes

1 rows

DRG Code	Description
883	Disorders of Personality and Impulse Control

Typical Clinical Scenarios

A young adult presents to outpatient psychiatry with long-standing pervasive social anxiety, odd beliefs, constricted affect, eccentric behavior, and transient psychotic-like experiences that do not meet criteria for schizophrenia. Symptoms began in adolescence, cause occupational and interpersonal impairment, and have been stable but persistent over years, prompting diagnostic clarification and ongoing psychotherapy/medication management. Typical codes: F21.
An emergency department evaluation for acute agitation and paranoid ideation in a middle-aged patient with no prior psychotic disorder reveals chronic odd speech, social isolation, and unusual perceptual experiences; after medical causes are ruled out and psychosis is judged non-bizarre and part of a longstanding personality-style disorder rather than primary schizophrenia, the diagnosis from this group is assigned for crisis disposition and follow-up planning. Typical codes: F21.
A primary care visit documents a patient with chronic difficulty forming relationships, eccentric behavior, and mild cognitive disorganization who presents for new-onset major depressive symptoms; the clinician codes the underlying personality/psychotic-spectrum condition to explain longstanding interpersonal dysfunction and to guide collaborative psychiatric care. Typical codes: F21.

Related Codes

F20-SCHIZOPHRENIA

ICD-10-CM Code For Schizophrenia: Group Overview

F22-DELUSIONAL-DISORDERS

ICD-10-CM Code For Delusional Disorders: Group Overview

F23-BRIEF-PSYCHOTIC-DISORDER

ICD-10-CM Code For Brief Psychotic Disorder: Group Overview

F24-SHARED-PSYCHOTIC-DISORDER

ICD-10-CM Code For Shared Psychotic Disorder: Group Overview

F25-SCHIZOAFFECTIVE-DISORDERS

ICD-10-CM Code For Schizoaffective Disorders: Group Overview

F28-OTHER-PSYCHOTIC-DISORDER

ICD-10-CM Code For Other Psychotic Disorder Not Due To A Substance Or Known Physiological Condition: Group Overview

F29-UNSPECIFIED-PSYCHOSIS-NOT-DUE-TO-A-SUBSTANCE

ICD-10-CM Code For Unspecified Psychosis Not Due To A Substance Or Known Physiological Condition: Group Overview

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

ICD-10-CM Code For Schizotypal Disorder: Group Overview

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ICD-10-CM F21: Schizotypal Disorder Overview

ICD-10-CM Code For Schizotypal Disorder: Group Overview

Sign up for ICD-10-CM Code For Schizotypal Disorder: Group Overview policy alerts

ICD-10-CM F21: Schizotypal Disorder Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

What diagnoses are included in ICD-10-CM group F21?

How does coding `F21` affect clinical documentation and reimbursement?

Which DRG is related to the F21 diagnosis group?

What clinical features should be captured when documenting `F21`?

Is `F21` limited to mood-related psychotic presentations?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

Related Codes

What diagnoses are included in ICD-10-CM group F21?

How does coding `F21` affect clinical documentation and reimbursement?

Which DRG is related to the F21 diagnosis group?

What clinical features should be captured when documenting `F21`?

Is `F21` limited to mood-related psychotic presentations?

References