Excludes1 pair
L29- vs L98.1
L29 and L98.1 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 L29
neurotic excoriation (L98.1)
L98.1
Factitial dermatitis
Billable
- Chapter 12
- Diseases of the skin and subcutaneous tissue
- Section
- L80-L99
Use when the record says
- Neurotic excoriation
Indexed under
- Dermatitis › artefacta
- Dermatitis › facta, factitia, factitial
- Dermatosis › factitial
- Excoriation › neurotic
- Neurosis, neurotic › excoriation
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