Loading...

    Explore
    • Policy Monitoring
    • Live Policy Feed
    • Billing Codes
    • NPI Medicare & Medicaid
    • Healthcare Providers
    • Health Insurance Payers
    • States
    • Service Lines
    • Taxonomy Codes
    Lookup tools
    • Billing Code Lookup
    • CPT Modifier Lookup
    • Provider Taxonomy Code Lookup
    • Healthcare Provider & Facility Lookup
    • Health Insurance Payer Lookup
    • Payer Contact Directory

    Policy & Benchmark Tools

    • Prior Authorization Lookup
    • Coverage Criteria Lookup
    • Timely Filing Lookup
    • Billing Code Reimbursement Rates
    • Payer Comparison Dashboard
    • Facility Comparison Dashboard
    • All tools

    Company

    • About OpenPayer
    • Data Sources
    • Trek Health
    OpenPayerby Trek Health
    LinkedInYouTube

    © 2026 Trek Health. All rights reserved.

    OpenPayer is built and maintained by Trek Health.

    v1.0.28
    OpenPayerBilling CodesOther disorders of the nervous systemICD-10-CM g94-other-disorders-of-brain
    Ask Trek AI about this page

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

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group G94 includes brain disorders that are secondary to diseases classified elsewhere, such as metabolic, infectious, or systemic inflammatory conditions causing encephalopathy, cerebral edema, or other brain dysfunctions. These ICD-10-CM diagnosis codes are used to document neurologic complications of systemic illnesses, capturing severity, organ involvement, and clinical complexity relevant to central nervous system manifestations. Accurate coding within the ICD-10-CM G94 group supports proper claim adjudication.

    Customize your policy alerts

    Sign up for ICD-10-CM Code For Other Disorders Of Brain In Diseases Classified Elsewhere: Group Overview policy alerts

    Get alerted when relevant policies change without checking for updates manually.

    Monitor payer policy activity

    Receive email alerts as soon as relevant payer policies are published or updated.

    ICD-10-CM G94: Other Disorders Of Brain In Diseases Classified Elsewhere Overview

    The ICD-10-CM G94 group captures brain disorders that arise as complications of systemic diseases classified elsewhere, affecting central nervous system structure and function. These codes target neurologic manifestations secondary to non-neurologic primary diagnoses and commonly involve altered consciousness, encephalopathy, or focal brain dysfunction. Accurate coding matters for reimbursement because it links the neurologic complication to the underlying systemic condition and supports correct claim adjudication.

    Table of contents

    Progress1 / 6

    Explore openpayer tools

    • Billing CodesCPT, HCPCS, DRG & more
    • Reimbursement RatesCommercial vs. Medicare rate reports
    • ProvidersHospitals & facilities
    • PayersPlans & market footprint
    • Taxonomy CodesNUCC specialty codes
    • ModifiersCPT modifiers & usage
    • Prior AuthorizationPA policies by payer & drug
    • Timely FilingFiling deadlines by payer
    • Coverage CriteriaMedical necessity by payer
    • Payer ContactsClaims, PA & appeals contacts
    View all tools

    When to Use

    Use a code from this group when a documented brain disorder is explicitly linked to a systemic or external disease that is classified elsewhere in ICD-10-CM. Select the appropriate G94 code only when clinical documentation specifies the neurologic complication and the underlying primary diagnosis in the record.

    ICD-10-CM Codes

    1 rows

    ICD-10-CM CodeDescription
    G94Other disorders of brain in diseases classified elsewhere

    DRG Codes

    2 rows

    DRG CodeDescription
    056Degenerative Nervous System Disorders with MCC
    057Degenerative Nervous System Disorders without MCC

    Typical Clinical Scenarios

    • An adult patient with a known systemic autoimmune disorder (such as systemic lupus erythematosus) presents with subacute cognitive decline, headaches, and new focal neurologic deficits after weeks of worsening systemic symptoms. Imaging demonstrates diffuse inflammatory changes in the brain consistent with involvement secondary to the systemic disease, and clinicians assign a code from this group to indicate brain disorder due to another underlying condition. Typical codes: G94
    • An elderly patient hospitalized for acute bacterial endocarditis develops sudden altered mental status, new focal weakness, and seizures; neuroimaging shows multifocal cerebral involvement consistent with septic emboli and secondary brain dysfunction from the primary infective process. Because the brain disorder is a direct consequence of the systemic infectious disease, a diagnosis from this group is used to capture the neurologic complication. Typical codes: G94
    • A patient with metastatic cancer receiving chemotherapy presents with progressive encephalopathy characterized by confusion, decreased level of consciousness, and diffuse white matter changes on MRI attributed to treatment-related or paraneoplastic processes rather than primary neurologic disease. Documentation assigns a code from this group to reflect the brain disorder as part of the broader neoplastic disease context. Typical codes: G94

    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

    G93-OTHER-DISORDERS-OF-BRAIN

    ICD-10-CM Code For Other Disorders Of Brain: 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.
    Published by

    Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

    Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.