C4A.71 (Merkel cell carcinoma of right lower limb, including hip) compared with C4A.72 (Merkel cell carcinoma of left lower limb, including hip), from the official CMS tabular data. C4A.71 and C4A.72 code the same condition on opposite sides. MedCoder-derived
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. C4A.71 and C4A.72 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.
| C4A.71Merkel cell carcinoma of right lower limb, including hip | C4A.72Merkel cell carcinoma of left lower limb, including hip | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | C00-D49 — Neoplasms | C00-D49 — Neoplasms |
| Definition | Merkel cell carcinoma of right lower limb, including hip is a billable ICD-10-CM diagnosis code (C4A.71). | Merkel cell carcinoma of left lower limb, including hip is a billable ICD-10-CM diagnosis code (C4A.72). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources