D27 (Benign neoplasm of ovary) compared with D49.59 (Neoplasm of unspecified behavior of other genitourinary organ), from the official CMS tabular data. D27 and D49.59 name the same anatomical site (corpus) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — benign neoplasm (corpus)
The behavior documented for the site — malignant primary, secondary, carcinoma in situ, benign, uncertain or unspecified — decides which column of the neoplasm table, and therefore which code, applies.
Source: CMS Table of Neoplasms
Same site, different neoplasm behavior. D49.59 and D27 name the same anatomical site (corpus) with a different neoplasm behavior.
From the CMS Table of Neoplasms: the behavior documented for that site — malignant primary, secondary, carcinoma in situ, benign, uncertain or unspecified — decides which column, and therefore which code, applies.
| D27Benign neoplasm of ovary | D49.59Neoplasm of unspecified behavior of other genitourinary organ | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Benign neoplasm of ovary is a non-billable ICD-10-CM category code (D27). | Neoplasm of unspecified behavior of other genitourinary organ is a billable ICD-10-CM diagnosis code (D49.59). |
| Includes | — | 'growth' NOS neoplasm NOS new growth NOS tumor NOS |
| Use additional code | 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