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    v1.0.28
    OpenPayerBilling CodesOther disorders of the nervous systemICD-10-CM g93-other-disorders-of-brain
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    ICD-10-CM Code For Other Disorders Of Brain: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group G93 includes nontraumatic brain disorders such as encephalopathy, brain edema, and other specified or unspecified disorders of the brain that affect cerebral function. These ICD-10-CM diagnosis codes are used to document clinical scenarios ranging from acute metabolic or toxic encephalopathy to chronic degenerative brain dysfunction, capturing disease severity, organ involvement, or clinical complexity relevant to this group. Accurate coding within the ICD-10-CM G93 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM G93: Other Disorders Of Brain Overview

    The ICD-10-CM G93 group represents nontraumatic disorders of the brain that do not fit into other specific neurological categories, including conditions such as encephalopathy, brain edema, and other unspecified brain disorders. These diagnoses target central nervous system dysfunction affecting brain structure or function. Accurate coding matters because it ensures complete clinical documentation and supports appropriate reimbursement and claim processing.

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    When to Use

    Use a code from this group when the clinical documentation identifies a nontraumatic brain disorder such as metabolic or toxic encephalopathy, brain edema, or an otherwise specified or unspecified brain disorder. These codes apply when the provider documents the brain condition as the primary neurological diagnosis needing reporting.

    ICD-10-CM Codes

    20 rows

    ICD-10-CM CodeDescription
    G93.0Cerebral cysts
    G93.1Anoxic brain damage, not elsewhere classified
    G93.2Benign intracranial hypertension
    G93.31Postviral fatigue syndrome
    G93.32Myalgic encephalomyelitis/chronic fatigue syndrome
    G93.39Other post infection and related fatigue syndromes
    G93.40Encephalopathy, unspecified
    G93.41Metabolic encephalopathy
    G93.42Megalencephalic leukoencephalopathy with subcortical cysts
    G93.43Leukoencephalopathy with calcifications and cysts
    G93.44Adult-onset leukodystrophy with axonal spheroids
    G93.45Developmental and epileptic encephalopathy
    G93.49Other encephalopathy
    G93.5Compression of brain
    G93.6Cerebral edema
    G93.7Reye's syndrome
    G93.81Temporal sclerosis
    G93.82Brain death
    G93.89Other specified disorders of brain
    G93.9Disorder of brain, unspecified

    DRG Codes

    17 rows

    DRG CodeDescription
    070Other Cerebrovascular Disorders with MCC
    071Other Cerebrovascular Disorders with CC
    072Other Cerebrovascular Disorders without CC/MCC
    080Nontraumatic Stupor and Coma with MCC
    081Nontraumatic Stupor and Coma without MCC
    091Other Disorders of Nervous System with MCC
    092Other Disorders of Nervous System with CC
    093Other Disorders of Nervous System without CC/MCC
    102Headaches with MCC
    103Headaches without MCC
    791Prematurity with Major Problems
    793Full Term Neonate with Major Problems
    947Signs and Symptoms with MCC
    948Signs and Symptoms without MCC
    974HIV with Major Related Condition with MCC
    975HIV with Major Related Condition with CC
    976HIV with Major Related Condition without CC/MCC

    Typical Clinical Scenarios

    • An elderly patient presents to the emergency department after days of progressive confusion, severe headache, nausea, and new-onset focal neurologic deficits; neuroimaging shows marked cerebral edema without an identifiable mass or acute infarct, and intracranial pressure monitoring confirms elevated pressure. A disorder from this group is assigned to capture diffuse brain swelling causing acute neurologic deterioration and need for urgent management. Typical codes: G93.6, G93.5
    • A middle-aged patient with a history of traumatic brain injury years earlier has persistent cognitive impairment, memory loss, and diffuse brain atrophy on MRI with progressive functional decline; they are seen in a neurology clinic for ongoing management and rehabilitation planning. A chronic degenerative or atrophic brain disorder code from this group is used to document the long-term structural and cognitive sequelae. Typical codes: G93.7, G93.2
    • A hospitalized patient with severe sepsis develops new, fluctuating encephalopathy with altered mental status and EEG demonstrating diffuse slowing; this acute brain dysfunction occurs as a complication of critical illness and requires coding to reflect brain dysfunction secondary to systemic disease. Typical codes: G93.41, G93.49

    Related Codes

    G90-DISORDERS-OF-AUTONOMIC-NERVOUS-SYSTEM

    ICD-10-CM Code For Disorders Of Autonomic Nervous System: Group Overview

    G91-HYDROCEPHALUS

    ICD-10-CM Code For Hydrocephalus: Group Overview

    G92-TOXIC-ENCEPHALOPATHY

    ICD-10-CM Code For Toxic Encephalopathy: Group Overview

    G94-OTHER-DISORDERS-OF-BRAIN

    ICD-10-CM Code For Other Disorders Of Brain In Diseases Classified Elsewhere: Group Overview

    G95-OTHER-AND-UNSPECIFIED-SPINAL-CORD

    ICD-10-CM Code For Other And Unspecified Diseases Of Spinal Cord: Group Overview

    G96-OTHER-DISORDERS-OF-CENTRAL-NERVOUS-SYSTEM

    ICD-10-CM Code For Other Disorders Of Central Nervous System: Group Overview

    G97-INTRAOPERATIVE-AND-POSTPROCEDURAL-NERVOUS-SYSTEM

    ICD-10-CM Code For Intraoperative And Postprocedural Complications Of Nervous System: Group Overview

    G98-OTHER-NERVOUS-SYSTEM-DISORDERS

    ICD-10-CM Code For Other Disorders Of Nervous System Not Elsewhere Classified: Group Overview

    G99-OTHER-DISORDERS-OF-NERVOUS-SYSTEM

    ICD-10-CM Code For Other Disorders Of Nervous System In Diseases Classified Elsewhere: 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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