T33.71XD (Superficial frostbite of right knee and lower leg, subsequent encounter) compared with T33.8 (Superficial frostbite of ankle, foot, and toe(s)), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Distinct conditions — both may be reported.
“superficial frostbite of ankle and foot (T33.8-)”
An Excludes2 note means the excluded condition is not part of the code above it, but a patient can have both. Report both when both are documented.
Source: CMS ICD-10-CM tabular instructional notes
Yes, when both are documented. T33.71XD carries an Excludes2 note covering T33.8: “superficial frostbite of ankle and foot (T33.8-)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
| T33.71XDSuperficial frostbite of right knee and lower leg, subsequent encounter | T33.8Superficial frostbite of ankle, foot, and toe(s) | |
|---|---|---|
| Billing status | Billable | Non-billable header Report instead: T33.811A, T33.811D, T33.811S, T33.812A, T33.812D |
| 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 | Superficial frostbite of right knee and lower leg, subsequent encounter is a billable ICD-10-CM diagnosis code (T33.71D). | Superficial frostbite of ankle, foot, and toe(s) is a non-billable ICD-10-CM category code (T33.8). |
| 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