ICD‑10 Code A184 – Tuberculosis of skin and subcutaneous tissue Tuberculosis of skin and subcutaneous tissue
Clinical context, related codes, and quick guidance
Billable
Active (Valid as of April 2025) · ICD-10-CM (US)
Code Details
| Code | A184 |
|---|---|
| Category | A183 – Tuberculosis of intestines, peritoneum and mesenteric glands Tuberculosis of intestines, peritoneum and mesenteric glands |
| Version | ICD-10-CM (US) |
| Status | Active (Valid as of April 2025) |
Plain‑English Summary
ICD-10-CM code A18.4 designates tuberculosis affecting the skin and underlying subcutaneous tissue. This billable code, effective October 1, 2025, covers various manifestations such as lupus vulgaris, scrofuloderma, and tuberculous erythema induratum. It helps classify specific cutaneous forms of this infectious disease for accurate diagnosis and reimbursement.
When to Use This Code
- Erythema induratum, tuberculous
- Lupus exedens
- Lupus vulgaris NOS
- Lupus vulgaris of eyelid
- Scrofuloderma
- Tuberculosis of external ear
Related Codes
Browse category »FAQ
ICD-10-CM code A18.4 specifically identifies tuberculosis of the skin and subcutaneous tissue. This includes various forms such as lupus vulgaris, scrofuloderma, and tuberculous erythema induratum, which are all manifestations of tuberculosis affecting the skin.
Yes, A18.4 is a billable/specific ICD-10-CM code used for reimbursement purposes. The 2026 edition of ICD-10-CM A18.4 became effective on October 1, 2025.
Common clinical presentations for A18.4 include chronic skin lesions like lupus vulgaris, which often affects the face, and scrofuloderma, characterized by skin involvement over tuberculous lymph nodes. Tuberculous erythema induratum, a type of panniculitis, also falls under this code, presenting as nodules or plaques on the calves that can ulcerate and scar.
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Tags :
A18.4
Tuberculosis of skin
Tuberculosis subcutaneous tissue
Cutaneous tuberculosis
Lupus vulgaris
Scrofuloderma
Erythema induratum tuberculous
Tuberculosis of external ear
Tuberculous skin infection
Skin TB ICD-10
ICD10 code for tuberculosis of skin
ICD-10 A18.4
Tuberculid
Tuberculosis verrucosa cutis
Tuberculous erythema nodosum