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    OpenPayerBilling CodesMalignant neoplasms of eye, brain and other parts of central nervous systemICD-10-CM c70-malignant-neoplasm-of-meninges
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    ICD-10-CM Code For Malignant Neoplasm Of Meninges: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group C70 includes malignant neoplasms of the meninges, covering primary meningeal tumors such as malignant meningioma and other malignant tumors originating in the meningeal layers. These ICD-10-CM diagnosis codes are used to document clinical encounters involving malignant meningeal tumors, capturing tumor location, extent, and related neurologic involvement. Accurate coding within the ICD-10-CM C70 group supports proper claim adjudication and complete clinical documentation.

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    ICD-10-CM C70: Malignant Neoplasm Of Meninges Overview

    This group includes malignant tumors arising from the meninges, the protective membranes covering the brain and spinal cord. These diagnoses affect the central nervous system and can cause focal neurologic deficits, increased intracranial pressure, and other serious complications. Accurate coding matters for clinical records and reimbursement because it captures disease location and guides appropriate claim processing.

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    When to Use

    Use a code from this group when a malignant tumor of the meninges has been diagnosed clinically, radiographically, or pathologically. Codes in this group are appropriate for encounters documenting treatment, evaluation, or ongoing management of malignant meningeal neoplasms.

    ICD-10-CM Codes

    3 rows

    ICD-10-CM CodeDescription
    C70.0Malignant neoplasm of cerebral meninges
    C70.1Malignant neoplasm of spinal meninges
    C70.9Malignant neoplasm of meninges, unspecified

    DRG Codes

    2 rows

    DRG CodeDescription
    054Nervous System Neoplasms with MCC
    055Nervous System Neoplasms without MCC

    Typical Clinical Scenarios

    • An elderly patient presents to the emergency department with progressive headaches, new-onset focal seizures, and unilateral cranial nerve deficits over several weeks; MRI reveals an extra-axial enhancing mass along the cerebral convexity consistent with a malignant meningeal tumor. Neurosurgery performs a biopsy confirming malignant meningioma, and the diagnosis from this group is assigned as the primary CNS malignant meningeal neoplasm. Typical codes: C70.0, C70.9
    • A middle-aged patient with a history of treated intracranial malignancy reports months of increasing cognitive decline, papilledema, and intermittent vomiting; imaging demonstrates diffuse leptomeningeal spread of tumor cells causing hydrocephalus. Oncology documents malignant involvement of the meninges as progression of disease and assigns a code from this group to capture leptomeningeal carcinomatosis of the meninges. Typical codes: C70.1, C70.9
    • A young adult admitted for acute onset of severe headache, neck stiffness, and rapidly worsening neurologic status after prior head and neck radiation; lumbar puncture and imaging identify malignant tumor invasion of the meninges causing acute obstructive hydrocephalus requiring temporary CSF diversion. The meningeal malignancy is coded to reflect the acute complication of malignant meningeal disease in a younger patient with prior radiation exposure. Typical codes: C70.1, C70.9

    Related Codes

    C69-MALIGNANT-NEOPLASM-OF-EYE-AND-ADNEXA

    ICD-10-CM Code For Malignant Neoplasm Of Eye And Adnexa: Group Overview

    C71-MALIGNANT-NEOPLASM-OF-BRAIN

    ICD-10-CM Code For Malignant Neoplasm Of Brain: Group Overview

    C72-SPINAL-CORD-CRANIAL-NERVE-NEOPLASMS

    ICD-10-CM Code For Malignant Neoplasm Of Spinal Cord Cranial Nerves And Other Parts Of Central 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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