2026 ICD-10-CM Diagnosis Code C79.32Secondary malignant neoplasm of cerebral meninges

ICD-10-CM Codes›C00–D49›C76-C80›C79

ICD-10-CM C79.32
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

C79.32 is a billable ICD-10-CM diagnosis code for secondary malignant neoplasm of cerebral meninges. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). Coders also document this condition as malignant neoplasm of brain meninges. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Secondary malignancies.

Code Identity

ICD-10-CM Code
C79.32
Billable Status
Yes — Valid for Submission
Code Describes
Secondary malignant neoplasm of cerebral meninges
Short Description
Secondary malignant neoplasm of cerebral meninges
Same as the full description in the CMS dataset.
Parent Code
C79.3
Secondary malignant neoplasm of brain and cerebral meninges

Code Classification

ChapterC00–D49Neoplasms
SectionC76-C80Malignant neoplasms of ill-defined, other secondary and unspecified sites
CategoryC79Secondary malignant neoplasm of other and unspecified sites
This CodeC79.32Secondary malignant neoplasm of cerebral meninges

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Malignant neoplasm of brain meninges
  • Metastatic malignant neoplasm of meninges
  • Metastatic malignant neoplasm to brain meninges

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NEO070
Secondary malignancies
Default principal diagnosis: inpatient Yes · outpatient Yes

Table of NeoplasmsClinical

Anatomical sites in the Table of Neoplasms that reference this code family.

SiteMalig.
Primary		Malig.
Secondary		Ca
in situ		BenignUncertainUnspec.
arachnoid › cerebralC70.0C79.32–D32.0D42.0D49.7
brain NEC › meningesC70.0C79.32–D32.0D42.0D49.7
cerebrum, cerebral (cortex) (hemisphere) (white matter) › meningesC70.0C79.32–D32.0D42.0D49.7
cranial (fossa, any) › meningesC70.0C79.32–D32.0D42.0D49.7
dura (cranial) (mater) › cerebralC70.0C79.32–D32.0D42.0D49.7
falx (cerebella) (cerebri)C70.0C79.32–D32.0D42.0D49.7
meninges › brainC70.0C79.32–D32.0D42.0D49.7
meninges › cerebralC70.0C79.32–D32.0D42.0D49.7
meninges › cranialC70.0C79.32–D32.0D42.0D49.7
meninges › intracranialC70.0C79.32–D32.0D42.0D49.7
pia mater › cerebralC70.0C79.32–D32.0D42.0D49.7
pia mater › cranialC70.0C79.32–D32.0D42.0D49.7
subduralC70.9C79.32–D32.9D42.9D49.7
tentorium (cerebelli)C70.0C79.32–D32.0D42.0D49.7

Patient EducationClinical

Brain Tumors

A brain tumor is a growth of abnormal cells in the tissues of the brain. Brain tumors can be benign, with no cancer cells, or malignant, with cancer cells that grow quickly. Some are primary brain tumors, which start in the brain. Others are metastatic, and they start somewhere else in the body and move to the brain.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert C79.32 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
198.4 Sec malig neo nerve NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About C79.32Overview

Is C79.32 (Secondary malignant neoplasm of brain and cerebral meninges) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report secondary malignant neoplasm of cerebral meninges on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of C79.32?

Under the General Equivalence Mappings, secondary malignant neoplasm of cerebral meninges converts to ICD-9-CM 198.4 (sec malig neo nerve NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.