2026 ICD-10-CM Diagnosis Code D42Neoplasm of uncertain behavior of meninges

ICD-10-CM Codes›C00–D49›D37-D48›D42

ICD-10-CM D42
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

D42 is a non-billable ICD-10-CM category code for neoplasm of uncertain behavior of meninges, so it cannot be submitted on claims. Use a more specific code from this category instead, such as D42.0, D42.1, and D42.9.

Code Identity

ICD-10-CM Code
D42
Billable Status
No — Non-Billable Category
Code Describes
Neoplasm of uncertain behavior of meninges
Chapter
D37-D48
Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes

Code Classification

ChapterC00–D49Neoplasms
SectionD37-D48Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes
CategoryD42Neoplasm of uncertain behavior of meninges
This CodeD42Neoplasm of uncertain behavior of meninges

Specific Coding for Neoplasm of uncertain behavior of meningesOverview

Non-specific codes like D42 require more characters. Use one of these billable codes instead:

  • Use D42.0 for Neoplasm of uncertain behavior of cerebral meninges

  • Use D42.1 for Neoplasm of uncertain behavior of spinal meninges

  • Use D42.9 for Neoplasm of uncertain behavior of meninges, unspecified

Patient EducationClinical

Brain Diseases

Your brain is the control center of your body. It controls your thoughts, memory, speech, and movement. It regulates the function of many organs. It's part of your nervous system, which also includes your spinal cord and peripheral nerves. The nervous system sends signals between your brain and the rest of the body.

Read the full article at MedlinePlus

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

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 D42Overview

Is D42 (Neoplasm of uncertain behavior of meninges) a billable code?

No. This is a category header that groups the codes for neoplasm of uncertain behavior of meninges, and headers cannot be submitted on claims. Claims for neoplasm of uncertain behavior of meninges need a more specific code from this category, such as D42.0, D42.1, and D42.9.