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    v1.0.28
    OpenPayerBilling CodesIntellectual DisabilitiesICD-10-CM f78-other-intellectual-disabilities
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    ICD-10-CM Code For Other Intellectual Disabilities: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group F78 includes intellectual developmental disorders that are atypical, unspecified, or otherwise not classifiable as mild, moderate, severe, or profound intellectual disability. These ICD-10-CM diagnosis codes are used to document cases where cognitive impairment is present but cannot be precisely categorized by standard severity levels, capturing diagnostic uncertainty and atypical presentations. Accurate coding within the ICD-10-CM F78 group supports proper claim adjudication and complete clinical documentation for appropriate reimbursement.

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    ICD-10-CM F78: Other Intellectual Disabilities Overview

    This group represents intellectual developmental disorders that do not fit the typical mild, moderate, severe, or profound categories and often include unspecified or atypical presentations. These diagnoses target neurodevelopmental function and cognitive impairment identified in childhood or across the lifespan. Accurate coding is important for reflecting clinical complexity and supports appropriate reimbursement and service planning.

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    When to Use

    Use a code from this group when a patient has documented intellectual disability that is described as other, unspecified, or atypical and the clinician has not assigned a specific severity level. Select these codes in clinical records and claims when diagnostic information is incomplete or when the presentation does not meet criteria for mild, moderate, severe, or profound intellectual disability.

    ICD-10-CM Codes

    2 rows

    ICD-10-CM CodeDescription
    F78.A1SYNGAP1-related intellectual disability
    F78.A9Other genetic related intellectual disability

    DRG Codes

    1 rows

    DRG CodeDescription
    884Organic Disturbances and Intellectual Disability

    Typical Clinical Scenarios

    • An adult patient with lifelong learning and adaptive functioning deficits presents to outpatient neurology for reassessment after developmental history reveals borderline-to-moderate cognitive delays that do not fit criteria for specific intellectual disability categories; the clinician documents generalized intellectual impairment not otherwise classifiable and assigns a code from this group to capture the non-specific intellectual disability. Typical codes: F78.A9
    • A pediatric patient is evaluated by a developmental pediatrician for delayed speech, social immaturity, and school performance significantly below age expectations without a clearly defined severity level on testing; because testing and records indicate an intellectual disability that is atypical or not classifiable into mild, moderate, severe, or profound categories, a code from this group is used for diagnostic coding. Typical codes: F78.A1, F78.A9
    • An adult with a long-standing, nonspecific intellectual impairment is hospitalized for a comorbid medical issue (e.g., aspiration pneumonia) and documentation is needed to reflect the patient’s baseline cognitive and adaptive limitations that affect hospital care and discharge planning; the admitting clinician codes the underlying unspecified/other intellectual disability from this group to convey the patient’s preexisting functional status. Typical codes: F78.A9

    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

    F79-UNSPECIFIED-INTELLECTUAL-DISABILITIES

    ICD-10-CM Code For Unspecified 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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