L13.0
BillableDermatitis herpetiformis
HCC Category Mapping
RxHCCHCC 314 — Pemphigus
0.000What This Code Means
A chronic blistering and itchy skin condition often associated with celiac disease, characterized by small blisters and intense itching.
Coding Tips
- •Always investigate and document the relationship to celiac disease (D90.0); many patients have underlying gluten sensitivity
- •This condition is strongly associated with gastrointestinal disease, so coordinate coding with GI documentation
Clinical Significance
Dermatitis herpetiformis is a chronic blistering skin condition strongly associated with celiac disease and gluten sensitivity. It is significant because it often signals underlying gastrointestinal autoimmune pathology requiring lifelong dietary management and monitoring. The condition requires ongoing dermatologic and potentially gastroenterologic care.
Documentation Requirements
- ✓Provider documentation of dermatitis herpetiformis diagnosis
- ✓Description of skin lesion morphology and distribution (typically extensor surfaces)
- ✓Biopsy with direct immunofluorescence showing granular IgA deposits when available
- ✓Association with celiac disease or gluten sensitivity if documented
- ✓Current treatment plan (dapsone, gluten-free diet)
- ✓Evidence the condition was evaluated or managed during the encounter
Excludes 1 — Do NOT code together
Commonly Confused Codes
L13.8 (Other specified bullous disorders) — use L13.0 specifically when dermatitis herpetiformis is documentedL20.9 (Atopic dermatitis, unspecified) — different mechanism; atopic dermatitis is not a bullous disorderB00.1 (Herpesviral vesicular dermatitis) — despite similar name, dermatitis herpetiformis is autoimmune, not viralL12.0 (Bullous pemphigoid) — different autoimmune blistering mechanism and immunofluorescence pattern