2026 ICD-10-CM Diagnosis Code C71.4Malignant neoplasm of occipital lobe

ICD-10-CM Codes›C00–D49›C69-C72›C71

ICD-10-CM C71.4
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

C71.4 is a billable ICD-10-CM diagnosis code for malignant neoplasm of occipital lobe. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nervous system cancers - brain.

Code Identity

ICD-10-CM Code
C71.4
Billable Status
Yes — Valid for Submission
Code Describes
Malignant neoplasm of occipital lobe
Short Description
Malignant neoplasm of occipital lobe
Same as the full description in the CMS dataset.
Parent Code
C71
Malignant neoplasm of brain

Code Classification

ChapterC00–D49Neoplasms
SectionC69-C72Malignant neoplasms of eye, brain and other parts of central nervous system
CategoryC71Malignant neoplasm of brain
This CodeC71.4Malignant neoplasm of occipital lobe

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Anaplastic astrocytoma of brain
  • Anaplastic astrocytoma of central nervous system
  • Astrocytoma of cerebrum
  • Ependymoma of cerebrum
  • Malignant neoplasm of occipital lobe
  • Oligodendroglioma of brain
  • Oligodendroglioma of cerebrum
  • Primary anaplastic astrocytoma of brain
  • Primary anaplastic astrocytoma of central nervous system
  • Primary anaplastic astrocytoma of cerebrum
  • Primary anaplastic astrocytoma of occipital lobe
  • Primary astrocytoma of cerebrum
  • Primary astrocytoma of occipital lobe
  • Primary glioblastoma multiforme of brain
  • Primary glioblastoma multiforme of cerebrum
  • Primary glioblastoma multiforme of occipital lobe
  • Primary malignant astrocytoma of brain
  • Primary malignant ependymoma of occipital lobe
  • Primary malignant glioma of occipital lobe
  • Primary malignant neoplasm of occipital lobe
  • Primary oligodendroglioma
  • Primary oligodendroglioma of brain
  • Primary oligodendroglioma of cerebrum
  • Primary oligodendroglioma of occipital lobe

Clinical ClassificationClinical

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

CCSR NEO048
Nervous system cancers - brain
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.
brain NEC › occipital lobeC71.4C79.31–D33.0D43.0D49.6
occipital › lobe or pole, brainC71.4C79.31–D33.0D43.0D49.6
pole › occipitalC71.4C79.31–D33.0D43.0D49.6

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 C71.4 to ICD-9-CMHistory

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

ICD-9-CM
191.4 Mal neo occipital lobe
Exact Match The mapping is direct, with no qualifiers.

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 C71.4Overview

Is C71.4 (Malignant neoplasm of brain) a billable code?

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

What is the ICD-9 equivalent of C71.4?

Under the General Equivalence Mappings, malignant neoplasm of occipital lobe converts to ICD-9-CM 191.4 (mal neo occipital lobe). The mapping is a direct match.

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.