Excludes1 pair
L53- vs L59.0
L53 and L59.0 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.
The official note, declared on L53
erythema ab igne (L59.0)
L53
Other erythematous conditions
Not billable
- Chapter 12
- Diseases of the skin and subcutaneous tissue
- Section
- L49-L54
L59.0
Erythema ab igne [dermatitis ab igne]
Billable
- Chapter 12
- Diseases of the skin and subcutaneous tissue
- Section
- L55-L59
Indexed under
- Dermatitis › ab igne
- Dermatitis › calorica
- Dermatitis › combustionis
- Dermatitis › heat
- Erythema, erythematous › ab igne
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027