D31.21 (Benign neoplasm of right retina) compared with D31.22 (Benign neoplasm of left retina), from the official CMS tabular data. D31.21 and D31.22 code the same condition on opposite sides.
Same condition; these differ only in which side is documented.
These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.
Source: ICD-10-CM tabular list (laterality variant derived from the code title)
Same condition, opposite side. D31.21 and D31.22 name the same condition on opposite sides of the body.
Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.
| D31.21Benign neoplasm of right retina | D31.22Benign neoplasm of left retina | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Benign neoplasm of right retina is a billable ICD-10-CM diagnosis code (D31.21). | Benign neoplasm of left retina is a billable ICD-10-CM diagnosis code (D31.22). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources