L59.0 vs T67.02XA
L59.0 (Erythema ab igne [dermatitis ab igne]) compared with T67.02XA (Exertional heatstroke, initial encounter), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. T67.02XA carries an Excludes1 note covering L59.0: “erythema [dermatitis] ab igne (L59.0)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. T67.02XA carries an Excludes1 note covering L59.0: “radiation-related disorders of the skin and subcutaneous tissue (L55-L59)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| L59.0Erythema ab igne [dermatitis ab igne] | T67.02XAExertional heatstroke, initial encounter | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99) | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) |
| Definition | Erythema ab igne [dermatitis ab igne] is a billable ICD-10-CM diagnosis code (L59.0). | Exertional heatstroke, initial encounter is a billable ICD-10-CM diagnosis code (T67.02A). |
| 7th character | — | The appropriate 7th character is to be added to each code from category T67 |
| Use additional code | — | code(s) to identify any associated complications of heatstroke, such as: coma and stupor (R40.-) rhabdomyolysis (M62.82) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources