C69.4 (Malignant neoplasm of ciliary body) compared with D31.4 (Benign neoplasm of ciliary body), from the official CMS tabular data. C69.4 and D31.4 name the same anatomical site (ciliary body) with a different neoplasm behavior.
Same anatomical site, different neoplasm behavior.
Same site — benign neoplasm (ciliary body)
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. C69.4 and D31.4 name the same anatomical site (ciliary body) 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.
| C69.4Malignant neoplasm of ciliary body | D31.4Benign neoplasm of ciliary body | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | C00-D49 — Neoplasms | C00-D49 — Neoplasms |
| Definition | Malignant neoplasm of ciliary body is a non-billable ICD-10-CM category code (C69.4). | Benign neoplasm of ciliary body is a non-billable ICD-10-CM category code (D31.4). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources