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    OpenPayerBilling CodesMental disorders due to known physiological conditionsICD-10-CM f04-amnestic-disorder-due-to-known-physiological-condition
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    ICD-10-CM Code For Amnestic Disorder Due To Known Physiological Condition: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group F04 includes diagnosed amnestic disorders that are directly caused by a known physiological condition such as neurological injury, metabolic derangement, infection, or toxic exposure and cover clinically significant memory impairment. These ICD-10-CM diagnosis codes are used to document clinical scenarios where memory loss is attributable to an underlying medical condition, capturing disease severity, associated neurological findings, or systemic involvement relevant to this group. Accurate coding within the ICD-10-CM F04 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM F04: Amnestic Disorder Due To Known Physiological Condition Overview

    The diagnoses in this group represent memory impairment directly attributable to an identifiable physiological condition affecting the brain or systemic illness. These disorders target cognitive function and are commonly associated with neurological injury, metabolic disturbance, infection, or toxic exposure. Accurate coding is important for appropriate clinical documentation and impacts reimbursement by linking the cognitive impairment to an underlying medical cause.

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    When to Use

    Use a code from this group when documentation specifies memory loss or amnestic syndrome and links it to a specific physiological condition such as traumatic brain injury, metabolic disturbance, infection, or toxic exposure. Select codes that reflect the documented etiology and severity of the amnestic disorder to ensure accurate clinical and administrative records.

    ICD-10-CM Codes

    1 rows

    ICD-10-CM CodeDescription
    F04Amnestic disorder due to known physiological condition

    DRG Codes

    1 rows

    DRG CodeDescription
    884Organic Disturbances and Intellectual Disability

    Typical Clinical Scenarios

    • An older adult is brought to the emergency department by family after acute onset of marked short-term memory loss following a complicated hospital course for sepsis and hypoxic respiratory failure. The patient is alert and oriented to person but repeatedly forgets recent conversations and events, with delirium ruled out and deficits attributable to a known physiological insult to the brain; a diagnosis from this group is assigned to capture the amnestic syndrome due to the identified medical condition. Typical codes: F04
    • A middle-aged patient with chronic traumatic brain injury presents to neurology clinic with persistent inability to form new memories and impaired learning that developed after the head injury months earlier; there is no primary neurodegenerative process identified and the cognitive deficits are stable but functionally significant, prompting assignment of a code from this group to represent amnestic disorder secondary to the known physiological brain injury. Typical codes: F04
    • A hospitalized patient with newly diagnosed Wernicke encephalopathy from prolonged thiamine deficiency exhibits prominent anterograde memory impairment after medically treating the metabolic cause; once the memory deficit is characterized as an amnestic disorder attributable to the underlying physiological condition rather than an acute confusional state, a code from this group is used to document the condition as a comorbid cognitive disorder affecting care and discharge planning. Typical codes: F04

    Related Codes

    F01-VASCULAR-DEMENTIA

    ICD-10-CM Code For Vascular Dementia: Group Overview

    F02-DEMENTIA-IN-OTHER-DISEASES

    ICD-10-CM Code For Dementia In Other Diseases Classified Elsewhere: Group Overview

    F03-UNSPECIFIED-DEMENTIA

    ICD-10-CM Code For Unspecified Dementia: Group Overview

    F05-DELIRIUM-DUE-TO-PHYSIOLOGICAL-CONDITION

    ICD-10-CM Code For Delirium Due To Known Physiological Condition: Group Overview

    F06-OTHER-MENTAL-DISORDERS-SECONDARY

    ICD-10-CM Code For Other Mental Disorders Due To Known Physiological Condition: Group Overview

    F07-PERSONALITY-AND-BEHAVIORAL-DISORDERS

    ICD-10-CM Code For Personality And Behavioral Disorders Due To Known Physiological Condition: Group Overview

    F09-UNSPECIFIED-MENTAL-DISORDER

    ICD-10-CM Code For Unspecified Mental Disorder Due To Known Physiological Condition: 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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