D33.9 — Benign neoplasm of central nervous system, unspecified
Is D33.9 billable?
Yes, but D33.9 is an unspecified code. D33.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, D33.9 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting D33.9 — the more specific alternatives are listed below.
D33.9 at a glance
| Code | D33.9 |
|---|---|
| Description | Benign neoplasm of central nervous system, unspecified |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does D33.9 group to?
D33.9 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
Inclusion terms
Alternative wording in documentation that is classified to D33.9.
- Benign neoplasm of nervous system (central) NOS
Excludes1 — never code together — inherited from D33
The conditions below can never be reported together with D33.9 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 D33.9 existed?
D33.9 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.