D27.1 (Benign neoplasm of left ovary) compared with D27.9 (Benign neoplasm of unspecified ovary), from the official CMS tabular data. D27.1 and D27.9 code the same condition on opposite sides.
Same condition; these differ only in which side is documented.
These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.
Source: ICD-10-CM tabular list (laterality variant derived from the code title)
Same condition, opposite side. D27.1 and D27.9 name the same condition on opposite sides of the body.
Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.
| D27.1Benign neoplasm of left ovary | D27.9Benign neoplasm of unspecified ovary | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Benign neoplasm of left ovary is a billable ICD-10-CM diagnosis code (D27.1). | Benign neoplasm of unspecified ovary is a billable ICD-10-CM diagnosis code (D27.9). |
| Use additional code | code to identify any functional activity. | code to identify any functional activity. |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources