D33.1 — Benign neoplasm of brain, infratentorial
Is D33.1 billable?
Yes — D33.1 is billable for FY2027. D33.1 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. D33.1 may be submitted for encounters from October 1, 2026 through September 30, 2027.
D33.1 at a glance
| Code | D33.1 |
|---|---|
| Description | Benign neoplasm of brain, infratentorial |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does D33.1 group to?
D33.1 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
How is D33.1 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to D33.1. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Papilloma › choroid plexus › fourth ventricle
Inclusion terms
Alternative wording in documentation that is classified to D33.1.
- Benign neoplasm of brain stem
- Benign neoplasm of cerebellum
- Benign neoplasm of fourth ventricle
Excludes1 — never code together — inherited from D33
The conditions below can never be reported together with D33.1 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
How long has D33.1 existed?
D33.1 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 D33.1?
ICD-10-CM declares these codes mutually exclusive with D33.1 — exactly one of each pair can be correct for a given encounter.