T21 vs T24
T21 (Burn and corrosion of trunk) compared with T24 (Burn and corrosion of lower limb, except ankle and foot), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. T24 carries an Excludes2 note covering T21: “burn and corrosion of hip region (T21.-)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| T21Burn and corrosion of trunk | T24Burn and corrosion of lower limb, except ankle and foot | |
|---|---|---|
| Billing status | Non-billable header Report instead: T21.00XA, T21.00XD, T21.00XS, T21.01XA, T21.01XD | Non-billable header Report instead: T24.001A, T24.001D, T24.001S, T24.002A, T24.002D |
| 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 | Burn and corrosion of trunk is a non-billable ICD-10-CM category code (T21). | Burn and corrosion of lower limb, except ankle and foot is a non-billable ICD-10-CM category code (T24). |
| 7th character | The appropriate 7th character is to be added to each code from category T21 | The appropriate 7th character is to be added to each code from category T24 |
| Includes | burns and corrosion of hip region burns and corrosions of first degree [erythema] burns and corrosions of second degree [blisters][epidermal loss] burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss] | burns and corrosions of first degree [erythema] burns and corrosions of second degree [blisters][epidermal loss] burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss] |
| Use additional code | code from category T31 or T32 to identify extent of body surface involved | code from category T31 or T32 to identify extent of body surface involved |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources