D28.9 vs D39.9

D28.9 (Benign neoplasm of female genital organ, unspecified) compared with D39.9 (Neoplasm of uncertain behavior of female genital organ, unspecified), from the official CMS tabular data. D28.9 and D39.9 name the same anatomical site (genital organ or tract) with a different neoplasm behavior. MedCoder-derived

Relationship

Informational

Neoplasm table relationship

D28.9

Benign neoplasm of female genital organ, unspecified

↔

D39.9

Neoplasm of uncertain behavior of female genital organ, unspecified

Same anatomical site, different neoplasm behavior.

Same site — uncertain behavior (genital organ or tract)

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

Can these codes be reported together?

Same site, different neoplasm behavior. D28.9 and D39.9 name the same anatomical site (genital organ or tract) with a different neoplasm behavior.

From the CMS/CDC 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.

Side by side

	D28.9Benign neoplasm of female genital organ, unspecified	D39.9Neoplasm of uncertain behavior of female genital organ, unspecified
Billing status	Billable	Billable
Classification	C00-D49 — Neoplasms	C00-D49 — Neoplasms
Definition	Benign neoplasm of female genital organ, unspecified is a billable ICD-10-CM diagnosis code (D28.9).	Neoplasm of uncertain behavior of female genital organ, unspecified is a billable ICD-10-CM diagnosis code (D39.9).
Includes	adenomatous polyp benign neoplasm of skin of female genital organs benign teratoma	—

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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources