A18.4
ICD-10BillableTuberculosis of skin and subcutaneous tissue
Official ICD-10-CM descriptor (FY2026)
Tuberculosis of skin and subcutaneous tissue
A18.4 is valid for submission on a claim — CMS flags it as a billable, specific code.
Inclusion terms
- Erythema induratum, tuberculous
- Lupus exedens
- Lupus vulgaris NOS
- Lupus vulgaris of eyelid
- Scrofuloderma
- Tuberculosis of external ear
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- lupus erythematosus (L93.-)
- systemic lupus erythematosus (M32.-)
Related codes in A18
- A18.0Tuberculosis of bones and jointscategory
- A18.1Tuberculosis of genitourinary systemcategory
- A18.2Tuberculous peripheral lymphadenopathy
- A18.3Tuberculosis of intestines, peritoneum and mesenteric glandscategory
- A18.5Tuberculosis of eyecategory
- A18.6Tuberculosis of (inner) (middle) ear
- A18.7Tuberculosis of adrenal glands
- A18.8Tuberculosis of other specified organscategory
Where this code sits
- Parent code
- A18
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.