ICD-10-CM 2027
ICD-10 code for Pseudomucinous ovary cyst
From the official ICD-10-CM alphabetic index entry “Cyst (colloid) (mucous) (simple) (retention) › pseudomucinous (ovary)”. Page updated September 29, 2026.
About coding Pseudomucinous ovary cyst
The ICD-10-CM code for Pseudomucinous ovary cyst is D27.9 (Benign neoplasm of unspecified ovary).
Within D27, choose D27.9 (unspecified ovary) only when documentation doesn't support a more specific option: right ovary (D27.0) and left ovary (D27.1).
Use an additional code to identify any functional activity.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about Pseudomucinous ovary cyst ICD-10 codes
What is the ICD-10 code for Pseudomucinous ovary cyst?
- D27.9 — Benign neoplasm of unspecified ovary.
Is D27.9 billable?
- Yes. D27.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can D27.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict D27.9 as a principal diagnosis.
Is D27.9 a CC or MCC?
- No. D27.9 is neither a CC nor an MCC under MS-DRG v44.0.