Tuberculosis of skin and subcutaneous tissue
Billable / specific
A18.4 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.
Inclusion terms
Applicable to
- Erythema induratum, tuberculous
- Lupus exedens
- Lupus vulgaris NOS
- Lupus vulgaris of eyelid
- Scrofuloderma
- Tuberculosis of external ear
Includes (from A18)
- diseases generally recognized as communicable or transmissible
- infections due to Mycobacterium tuberculosis and Mycobacterium bovis
Excludes1
Not coded here — never report together with this code.
- congenital tuberculosis (P37.0) (from A18)
- nonspecific reaction to test for tuberculosis without active tuberculosis (R76.1-) (from A18)
- pneumoconiosis associated with tuberculosis, any type in A15 (J65) (from A18)
- positive PPD (R76.11) (from A18)
- positive tuberculin skin test without active tuberculosis (R76.11) (from A18)
- sequelae of tuberculosis (B90.-) (from A18)
- silicotuberculosis (J65) (from A18)
Excludes2
Not included here — may be reported together when both conditions exist.
- lupus erythematosus (L93.-)
- systemic lupus erythematosus (M32.-)
- carrier or suspected carrier of infectious disease (Z22.-) (from A18)
- certain localized infections - see body system-related chapters (from A18)
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-) (from A18)
- infectious and parasitic diseases specific to the perinatal period (P35-P39) (from A18)
- influenza and other acute respiratory infections (J00-J22) (from A18)
Use additional code
Add a code to identify the following, if applicable.
Also known as
- Erythema induratum, tuberculous
- Lupus exedens
- Lupus vulgaris NOS
- Lupus vulgaris of eyelid
- Scrofuloderma
- Tuberculosis of external ear
- Acnitis
- Bazin's disease
- Cellulitis, tuberculous
- Erythema, erythematous, induratum, tuberculous
- Erythema, erythematous, nodosum, tuberculous
- Erythema, erythematous, tuberculous
- Gumma, scrofulous
- Gumma, tuberculous
- Lichen, scrofulosus
- Lichenoides tuberculosis
- Lupus, exedens
- Lupus, tuberculous
- Lupus, tuberculous, eyelid
- Lupus, vulgaris
- Lupus, vulgaris, eyelid
Parent code
- A18Tuberculosis of other organsHeader
Related codes
- A18.0Tuberculosis of bones and jointsHeader
- A18.1Tuberculosis of genitourinary systemHeader
- A18.2Tuberculous peripheral lymphadenopathyBillable
- A18.3Tuberculosis of intestines, peritoneum and mesenteric glandsHeader
- A18.5Tuberculosis of eyeHeader
- A18.6Tuberculosis of (inner) (middle) earBillable
- A18.7Tuberculosis of adrenal glandsBillable
- A18.8Tuberculosis of other specified organsHeader