C71.7 — Malignant neoplasm of brain stem

BillableCC

Is C71.7 billable?

Yes — C71.7 is billable for FY2027. C71.7 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. C71.7 may be submitted for encounters from October 1, 2026 through September 30, 2027.

C71.7 at a glance

Code	C71.7
Description	Malignant neoplasm of brain stem
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does C71.7 group to?

C71.7 sits in MDC 01 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

054Nervous System Neoplasms with MCCmedical
055Nervous System Neoplasms without MCCmedical

As a secondary diagnosis, C71.7 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.

Inclusion terms

Alternative wording in documentation that is classified to C71.7.

Malignant neoplasm of fourth cerebral ventricle
Infratentorial malignant neoplasm NOS

Excludes1 — never code together — inherited from C71

The conditions below can never be reported together with C71.7 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

malignant neoplasm of cranial nerves (C72.2-C72.5)
retrobulbar malignant neoplasm (C69.6-)

How long has C71.7 existed?

C71.7 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

Which codes are confused with C71.7?

ICD-10-CM declares these codes mutually exclusive with C71.7 — exactly one of each pair can be correct for a given encounter.

vs C71.5Malignant neoplasm of cerebral ventricle