F42.4 vs L98.1
F42.4 (Excoriation (skin-picking) disorder) compared with L98.1 (Factitial dermatitis), 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. F42.4 carries an Excludes1 note covering L98.1: “factitial dermatitis (L98.1)”
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. L98.1 carries an Excludes1 note covering F42.4: “Excoriation (skin-picking) disorder (F42.4)”
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
| F42.4Excoriation (skin-picking) disorder | L98.1Factitial dermatitis | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | F01-F99 — Mental, Behavioral and Neurodevelopmental Disorders (F01-F99) | L00-L99 — Diseases of the Skin and Subcutaneous Tissue (L00-L99) |
| Definition | Excoriation (skin-picking) disorder is a billable ICD-10-CM diagnosis code (F42.4). | Factitial dermatitis is a billable ICD-10-CM diagnosis code (L98.1). |
| Includes | — | Neurotic excoriation |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources