D23.7 (Other benign neoplasm of skin of lower limb, including hip) compared with D48.5 (Neoplasm of uncertain behavior of skin), from the official CMS tabular data. D23.7 and D48.5 name the same anatomical site (nail) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — uncertain behavior (nail)
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. D23.7 and D48.5 name the same anatomical site (nail) 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.
| D23.7Other benign neoplasm of skin of lower limb, including hip | D48.5Neoplasm of uncertain behavior of skin | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Other benign neoplasm of skin of lower limb, including hip is a non-billable ICD-10-CM category code (D23.7). | Neoplasm of uncertain behavior of skin is a billable ICD-10-CM diagnosis code (D48.5). |
| Includes | benign neoplasm of hair follicles benign neoplasm of sebaceous glands benign neoplasm of sweat glands | Neoplasm of uncertain behavior of anal margin Neoplasm of uncertain behavior of anal skin Neoplasm of uncertain behavior of perianal skin Neoplasm of uncertain behavior of skin of breast |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources