D40.11 (Neoplasm of uncertain behavior of right testis) compared with D40.12 (Neoplasm of uncertain behavior of left testis), from the official CMS tabular data. D40.11 and D40.12 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. D40.11 and D40.12 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.
| D40.11Neoplasm of uncertain behavior of right testis | D40.12Neoplasm of uncertain behavior of left testis | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Neoplasm of uncertain behavior of right testis is a billable ICD-10-CM diagnosis code (D40.11). | Neoplasm of uncertain behavior of left testis is a billable ICD-10-CM diagnosis code (D40.12). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources