D31.6 (Benign neoplasm of unspecified site of orbit) compared with D48.1 (Neoplasm of uncertain behavior of connective and other soft tissue), from the official CMS tabular data. D31.6 and D48.1 name the same anatomical site (connective tissue) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — benign neoplasm (connective tissue)
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. D48.1 and D31.6 name the same anatomical site (connective tissue) 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.
| D31.6Benign neoplasm of unspecified site of orbit | D48.1Neoplasm of uncertain behavior of connective and other soft tissue | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Benign neoplasm of unspecified site of orbit is a non-billable ICD-10-CM category code (D31.6). | Neoplasm of uncertain behavior of connective and other soft tissue is a non-billable ICD-10-CM category code (D48.1). |
| Includes | Benign neoplasm of connective tissue of orbit Benign neoplasm of extraocular muscle Benign neoplasm of peripheral nerves of orbit Benign neoplasm of retrobulbar tissue | Neoplasm of uncertain behavior of connective tissue of ear Neoplasm of uncertain behavior of connective tissue of eyelid Stromal tumors of uncertain behavior of digestive system |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources