D24 (Benign neoplasm of breast) compared with D49.3 (Neoplasm of unspecified behavior of breast), from the official CMS tabular data. D24 and D49.3 name the same anatomical site (areola) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — unspecified behavior (areola)
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. D24 and D49.3 name the same anatomical site (areola) 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.
| D24Benign neoplasm of breast | D49.3Neoplasm of unspecified behavior of breast | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Benign neoplasm of breast is a non-billable ICD-10-CM category code (D24). | Neoplasm of unspecified behavior of breast is a billable ICD-10-CM diagnosis code (D49.3). |
| Includes | benign neoplasm of connective tissue of breast benign neoplasm of soft parts of breast fibroadenoma of breast | 'growth' NOS neoplasm NOS new growth NOS tumor NOS |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources