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    v1.0.28
    OpenPayerBilling CodesIntellectual DisabilitiesICD-10-CM f79-unspecified-intellectual-disabilities
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    ICD-10-CM Code For Unspecified Intellectual Disabilities: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group F79 includes diagnoses of intellectual disability that are unspecified in severity or lack sufficient documentation to assign a more specific level, encompassing global developmental cognitive impairments identified in childhood or across the lifespan. These ICD-10-CM diagnosis codes are used to document clinical encounters where intellectual functioning and adaptive behavior are impaired but severity or associated conditions are not fully characterized, capturing diagnostic uncertainty and documentation gaps. Accurate coding within the ICD-10-CM F79 group supports appropriate claim adjudication, complete clinical documentation, and proper linkage of services to the patient’s documented needs.

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    ICD-10-CM F79: Unspecified Intellectual Disabilities Overview

    This group covers diagnoses of intellectual disability when the severity cannot be specified or when documentation lacks detail. These conditions affect cognitive functioning and adaptive behavior across developmental domains. Accurate coding matters for reimbursement because it connects documented clinical status to billing and supports resource allocation for care.

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    When to Use

    Use a code from this group when a clinician documents intellectual disability without specifying mild, moderate, severe, or profound levels. Apply these codes when documentation does not support assignment of a more specific intellectual disability code or when further evaluation is pending.

    ICD-10-CM Codes

    1 rows

    ICD-10-CM CodeDescription
    F79Unspecified intellectual disabilities

    DRG Codes

    1 rows

    DRG CodeDescription
    884Organic Disturbances and Intellectual Disability

    Typical Clinical Scenarios

    • A young adult with lifelong global developmental delays presents to a primary care clinic for a routine annual health maintenance visit; they have limited functional communication, require assistance with activities of daily living, and no specific degree of intellectual impairment has been documented in prior records. The visit is to update problem lists and coordinate social supports, and a nonspecific intellectual disability diagnosis is recorded when detailed testing to specify severity is unavailable or obsolete. Typical codes: F79.
    • A middle-aged patient is admitted from a group home to the emergency department after a fall with minor injuries; staff report chronic impaired cognition and adaptive functioning but prior evaluations do not contain a clear severity classification. The hospital documents the intellectual disability as part of the patient’s baseline neurodevelopmental status to inform care planning and discharge needs when a more specific code cannot be determined. Typical codes: F79.
    • An elderly individual with long-standing cognitive and adaptive limitations is seen by a geriatric psychiatrist for behavioral disturbances and increasing dependence; formal psychometric testing is not performed during the consultation, and the clinician documents an unspecified intellectual disability to reflect the chronic neurodevelopmental disorder as a comorbid condition. Typical codes: F79.

    Related Codes

    F70-MILD-INTELLECTUAL-DISABILITIES

    ICD-10-CM Code For Mild Intellectual Disabilities: Group Overview

    F71-MODERATE-INTELLECTUAL-DISABILITIES

    ICD-10-CM Code For Moderate Intellectual Disabilities: Group Overview

    F72-SEVERE-INTELLECTUAL-DISABILITIES

    ICD-10-CM Code For Severe Intellectual Disabilities: Group Overview

    F73-PROFOUND-INTELLECTUAL-DISABILITIES

    ICD-10-CM Code For Profound Intellectual Disabilities: Group Overview

    F78-OTHER-INTELLECTUAL-DISABILITIES

    ICD-10-CM Code For Other Intellectual Disabilities: Group Overview

    Frequently Asked Questions

    References

    1. 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. 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. 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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