T34.70 (Frostbite with tissue necrosis of unspecified knee and lower leg) compared with T34.71 (Frostbite with tissue necrosis of right knee and lower leg), from the official CMS tabular data. T34.70 and T34.71 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. T34.70 and T34.71 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.
| T34.70Frostbite with tissue necrosis of unspecified knee and lower leg | T34.71Frostbite with tissue necrosis of right knee and lower leg | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) |
| Definition | Frostbite with tissue necrosis of unspecified knee and lower leg is a non-billable ICD-10-CM category code (T34.70). | Frostbite with tissue necrosis of right knee and lower leg is a non-billable ICD-10-CM category code (T34.71). |
| 7th character | The appropriate 7th character is to be added to each code from category T34 | The appropriate 7th character is to be added to each code from category T34 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources