T33.41XA (Superficial frostbite of right arm, initial encounter) compared with T33.42XA (Superficial frostbite of left arm, initial encounter), from the official CMS tabular data. T33.41XA and T33.42XA 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. T33.41XA and T33.42XA 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.
| T33.41XASuperficial frostbite of right arm, initial encounter | T33.42XASuperficial frostbite of left arm, initial encounter | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | S00-T88 — Injury, poisoning and certain other consequences of external causes | S00-T88 — Injury, poisoning and certain other consequences of external causes |
| Definition | Superficial frostbite of right arm, initial encounter is a billable ICD-10-CM diagnosis code (T33.41A). | Superficial frostbite of left arm, initial encounter is a billable ICD-10-CM diagnosis code (T33.42A). |
| 7th character | The appropriate 7th character is to be added to each code from category T33 | The appropriate 7th character is to be added to each code from category T33 |
| Includes | frostbite with partial thickness skin loss | frostbite with partial thickness skin loss |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources