C71.9 MALIGNANT NEOPLASM OF BRAIN, UNSPECIFIED

Code Information

Diagnosis Code: C71.9
Short Description: Malignant neoplasm of brain, unspecified
Long Description: Malignant neoplasm of brain, unspecified
Code Version: 2025 ICD-10-CM

The code C71.9 is VALID for claim submission

Code Classification

Neoplasms (C00–D49)
- Malignant neoplasms of eye, brain and other parts of central nervous system (C69-C72)
  - Malignant neoplasm of brain (C71)

Synonyms

Anaplastic astrocytoma of brain
Anaplastic astrocytoma of central nervous system
Anaplastic astrocytoma of central nervous system
Anaplastic glioma of brain
Astroblastoma of brain
Astroblastoma of central nervous system
Astroblastoma of central nervous system
Astrocytoma of brain
Carcinoma of brain
Dementia due to primary malignant neoplasm of brain
Desmoplastic nodular medulloblastoma of brain
Diffuse astrocytoma of brain
Embryonal carcinoma
Ependymoblastoma
Ependymoma
Ependymoma of brain
Fibrillary astrocytoma of brain
Fibrillary astrocytoma of central nervous system
Fibrillary astrocytoma of central nervous system
Ganglioneuroblastoma
Ganglioneuroblastoma of central nervous system
Gemistocytic astrocytoma of brain
Gemistocytic astrocytoma of central nervous system
Gemistocytic astrocytoma of central nervous system
Germ cell tumor of the brain
Germ cell tumor of the brain
Giant cell glioblastoma of brain
Giant cell glioblastoma of central nervous system
Giant cell glioblastoma of central nervous system
Glial tumor of brain
Glioblastoma multiforme
Glioblastoma multiforme of brain
Gliosarcoma of brain
Gliosarcoma of central nervous system
Gliosarcoma of central nervous system
Grade 4 malignant glioma of brain
High grade astrocytoma of brain
Large cell medulloblastoma of brain
Low grade astrocytoma of brain
Low grade glioma of brain
Low grade malignant glioma of brain
Malignant glioma of brain
Malignant neoplasm of axial suprasellar region of brain
Malignant neoplasm of brain
Malignant teratoma
Medulloblastoma
Medulloblastoma
Medulloblastoma
Medulloblastoma
Medulloblastoma
Medulloblastoma
Mixed glial tumor of brain
Mixed glioma
Mixed oligoastrocytoma
Neoplasm of pituitary and suprasellar region
Neuroblastoma of brain
Neuroblastoma of central nervous system
Neuroblastoma of central nervous system
Oligodendroglioma
Oligodendroglioma of brain
Pilomyxoid astrocytoma
Pilomyxoid astrocytoma
Pilomyxoid astrocytoma
Pilomyxoid astrocytoma of brain
Pleomorphic xanthoastrocytoma
Pleomorphic xanthoastrocytoma of brain
Primary anaplastic astrocytoma of brain
Primary anaplastic astrocytoma of central nervous system
Primary anaplastic glioma of brain
Primary anaplastic large cell medulloblastoma of brain
Primary astroblastoma of brain
Primary astroblastoma of central nervous system
Primary desmoplastic nodular medulloblastoma of brain
Primary diffuse astrocytoma of brain
Primary embryonal carcinoma of brain
Primary ependymoblastoma
Primary fibrillary astrocytoma of brain
Primary fibrillary astrocytoma of central nervous system
Primary ganglioneuroblastoma
Primary ganglioneuroblastoma of brain
Primary ganglioneuroblastoma of central nervous system
Primary gemistocytic astrocytoma of brain
Primary gemistocytic astrocytoma of central nervous system
Primary giant cell glioblastoma of brain
Primary giant cell glioblastoma of central nervous system
Primary glioblastoma multiforme of brain
Primary gliosarcoma of brain
Primary gliosarcoma of central nervous system
Primary large cell medulloblastoma of brain
Primary malignant astrocytoma of brain
Primary malignant atypical teratoid rhabdoid neoplasm of brain
Primary malignant atypical teratoid rhabdoid neoplasm of central nervous system
Primary malignant glioma of brain
Primary malignant neoplasm of brain
Primary medulloblastoma
Primary mixed glioma
Primary mixed oligoastrocytoma
Primary neuroblastoma
Primary neuroblastoma of brain
Primary neuroblastoma of central nervous system
Primary oligodendroglioma
Primary oligodendroglioma of brain
Primary pilomyxoid astrocytoma
Primary pilomyxoid astrocytoma of brain
Primary pleomorphic xanthoastrocytoma of brain
Primary primitive neuroectodermal tumor
Primary protoplasmic astrocytoma of brain
Primary teratoma of brain
Primitive neuroectodermal tumor
Protoplasmic astrocytoma of brain
RELA fusion-positive supratentorial ependymoma
Suprasellar germ cell tumor

Crosswalk Information

ICD-10 Code		ICD-9 Code	ICD-9 Description
C71.9		191.9	Malig neo brain NOS

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code	ICD-10 Description
C71	Malignant neoplasm of brain
C71.0	Malignant neoplasm of cerebrum, except lobes and ventricles
C71.1	Malignant neoplasm of frontal lobe
C71.2	Malignant neoplasm of temporal lobe
C71.3	Malignant neoplasm of parietal lobe
C71.4	Malignant neoplasm of occipital lobe
C71.5	Malignant neoplasm of cerebral ventricle
C71.6	Malignant neoplasm of cerebellum
C71.7	Malignant neoplasm of brain stem
C71.8	Malignant neoplasm of overlapping sites of brain

This page was last updated on: 10/1/2025

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