T25.52 vs T25.53
T25.52 (Corrosion of first degree of foot) compared with T25.53 (Corrosion of first degree of toe(s) (nail)), 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. T25.52 carries an Excludes2 note covering T25.53: “corrosion of first degree of toe(s) (nail) (T25.53-)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| T25.52Corrosion of first degree of foot | T25.53Corrosion of first degree of toe(s) (nail) | |
|---|---|---|
| Billing status | Non-billable header Report instead: T25.521A, T25.521D, T25.521S, T25.522A, T25.522D | Non-billable header Report instead: T25.531A, T25.531D, T25.531S, T25.532A, T25.532D |
| Classification | S00-T88 — Injury, poisoning and certain other consequences of external causes | S00-T88 — Injury, poisoning and certain other consequences of external causes |
| Definition | Corrosion of first degree of foot is a non-billable ICD-10-CM category code (T25.52). | Corrosion of first degree of toe(s) (nail) is a non-billable ICD-10-CM category code (T25.53). |
| 7th character | The appropriate 7th character is to be added to each code from category T25 | The appropriate 7th character is to be added to each code from category T25 |
| Includes | 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 | external cause code to identify place (Y92) code from category T31 or T32 to identify extent of body surface involved | external cause code to identify place (Y92) code from category T31 or T32 to identify extent of body surface involved |
| Code first | (T51-T65) to identify chemical and intent | (T51-T65) to identify chemical and intent |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources