L53 vs L59.0
L53 and L59.0 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
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 (eczematous)
- Dermatitis › calorica (eczematous)
- Dermatitis › combustionis (eczematous)
- Dermatitis › heat (eczematous)
- Erythema, erythematous › ab igne (infectional) (inflammation)
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