ICD-10-CM 2027
ICD-10 code for Gliomatosis cerebri
Malignant neoplasm of cerebrum, except lobes and ventricles
From the official ICD-10-CM alphabetic index entry “Gliomatosis cerebri”. Page updated September 29, 2026.
About coding Gliomatosis cerebri
The ICD-10-CM code for Gliomatosis cerebri is C71.0 (Malignant neoplasm of cerebrum, except lobes and ventricles).
Within C71 (malignant neoplasm of brain), C71.0 is specifically for malignant neoplasm of cerebrum, except lobes and ventricles. Related codes cover frontal lobe (C71.1), temporal lobe (C71.2), parietal lobe (C71.3), occipital lobe (C71.4), cerebral ventricle (C71.5), cerebellum (C71.6), stem (C71.7), overlapping sites of brain (C71.8) and 1 more.
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
In MS-DRG v44.0, it is part of the grouping logic for DRG 054 (Nervous System Neoplasms with MCC, relative weight 1.5194) and DRG 055 (Nervous System Neoplasms without MCC, relative weight 1.0296), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Gliomatosis cerebri ICD-10 codes
What is the ICD-10 code for Gliomatosis cerebri?
- C71.0 — Malignant neoplasm of cerebrum, except lobes and ventricles.
Is C71.0 billable?
- Yes. C71.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can C71.0 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict C71.0 as a principal diagnosis.
Is C71.0 a CC or MCC?
- C71.0 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.