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    OpenPayerBilling CodesPolyneuropathies and other disorders of the peripheral nervous systemICD-10-CM g65-sequelae-of-polyneuropathies
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    ICD-10-CM Code For Sequelae Of Inflammatory And Toxic Polyneuropathies: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group G65 includes diagnoses describing residual effects of inflammatory and toxic polyneuropathies, covering chronic sensory, motor, and autonomic impairments that persist after the acute insult. These ICD-10-CM diagnosis codes are used to document ongoing neurological deficits, functional impairment, and the need for continued rehabilitation or management related to prior peripheral nerve injury. Accurate coding within the ICD-10-CM G65 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM G65: Sequelae Of Inflammatory And Toxic Polyneuropathies Overview

    The diagnoses in this group represent residual effects (sequelae) of prior inflammatory or toxic injuries to peripheral nerves, affecting the peripheral nervous system and resulting in chronic sensory, motor, or autonomic dysfunction. These codes capture long-term complications after the acute phase of conditions such as postinfectious, immune-mediated, or toxin-induced polyneuropathies. Accurate coding matters for appropriate reimbursement and to reflect ongoing care needs and functional limitations.

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    When to Use

    Use a code from this group when a patient presents with chronic neurological deficits attributable to a prior inflammatory or toxic polyneuropathy and the acute phase has resolved. These codes apply when documentation links current functional limitations or symptoms to a past inflammatory or toxic peripheral nerve injury.

    ICD-10-CM Codes

    3 rows

    ICD-10-CM CodeDescription
    G65.0Sequelae of Guillain-Barre syndrome
    G65.1Sequelae of other inflammatory polyneuropathy
    G65.2Sequelae of toxic polyneuropathy

    DRG Codes

    2 rows

    DRG CodeDescription
    073Cranial and Peripheral Nerve Disorders with MCC
    074Cranial and Peripheral Nerve Disorders without MCC

    Typical Clinical Scenarios

    • An elderly patient with a months-long history of progressive numbness, burning pain, and weakness in a stocking-glove distribution after a documented episode of severe toxic exposure to chemotherapy agents presents to neurology for evaluation. Electrophysiologic studies show axonal polyneuropathy consistent with a prior inflammatory/toxic insult and the symptoms are attributed to sequelae rather than an active process, prompting assignment of a sequela code for persistent deficits. Typical codes: G65.2
    • A middle-aged adult previously hospitalized for Guillain-Barré syndrome now has persistent motor weakness and sensory deficits six months after the acute illness, resulting in gait impairment and need for outpatient rehabilitation; the patient is seen for follow-up to document residual neuropathic deficits. Because the neuropathy represents residual effects of a prior inflammatory polyneuropathy, a sequela diagnosis is used to capture the chronic residual condition. Typical codes: G65.0
    • A working-age patient with prior documented exposure to industrial solvents presents to occupational medicine with ongoing paresthesias and decreased distal reflexes that began after the exposure and have not improved; the visit documents long-term consequences of the toxic polyneuropathy to support workplace accommodations and disability evaluation. The clinician assigns a code indicating sequela of toxic polyneuropathy to reflect the persistent, nonacute neurologic impairment. Typical codes: G65.1

    Related Codes

    G60-HEREDITARY-AND-IDIOPATHIC-NEUROPATHY

    ICD-10-CM Code For Hereditary And Idiopathic Neuropathy: Group Overview

    G61-INFLAMMATORY-POLYNEUROPATHY

    ICD-10-CM Code For Inflammatory Polyneuropathy: Group Overview

    G62-OTHER-AND-UNSPECIFIED-POLYNEUROPATHIES

    ICD-10-CM Code For Other And Unspecified Polyneuropathies: Group Overview

    G63-POLYNEUROPATHY-IN-DISEASES-CLASSIFIED-ELSEWHERE

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

    G64-OTHER-PERIPHERAL-NERVE-DISORDERS

    ICD-10-CM Code For Other Disorders Of Peripheral Nervous System: 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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