A18.4
BillableTuberculosis of skin and subcutaneous tissue
Tuberculosis of skin and subcutaneous tissue
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Erythema induratum, tuberculous
- Lupus exedens
- Lupus vulgaris NOS
- Lupus vulgaris of eyelid
- Scrofuloderma
- Tuberculosis of external ear
Includes
Conditions included under this code
- diseases generally recognized as communicable or transmissible
- infections due to Mycobacterium tuberculosis and Mycobacterium bovis
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- certain localized infections - see body system-related chapters
- •congenital tuberculosisP37.0
- •nonspecific reaction to test for tuberculosis without active tuberculosisR76.1
- •pneumoconiosis associated with tuberculosis, any type inA15, J65
- •positive PPDR76.11
- •positive tuberculin skin test without active tuberculosisR76.11
- •sequelae of tuberculosisB90
- •silicotuberculosisJ65
Excludes 2
Conditions not included here, but the patient may have both
- •carrier or suspected carrier of infectious diseaseZ22
- •infectious and parasitic diseases complicating pregnancy, childbirth and the puerperiumO98
- •infectious and parasitic diseases specific to the perinatal periodP35-P39
- •influenza and other acute respiratory infectionsJ00-J22
- •lupus erythematosusL93
- •systemic lupus erythematosusM32
Use Additional Code
Additional codes that should follow this code
Related Codes(8)
A18.0Tuberculosis of bones and joints
A18.1Tuberculosis of genitourinary system
A18.2Tuberculous peripheral lymphadenopathy
A18.3Tuberculosis of intestines, peritoneum and mesenteric glands
A18.5Tuberculosis of eye
A18.6Tuberculosis of (inner) (middle) ear
A18.7Tuberculosis of adrenal glands
A18.8Tuberculosis of other specified organs
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(203)
SNOMED CT
- Erythema induratum2028007
- Tuberculosis of subcutaneous cellular tissue8250007
- Lichen scrofulosorum9768003
- Tuberculosis cutis lichenoides9768003
- Tuberculosis lichenoides9768003
- LV - Lupus vulgaris10528009
- Lupus exedens10528009
- Lupus vulgaris10528009
- Tuberculosis cutis luposa10528009
- Tuberculosis luposa cutis10528009
- Tuberculosis lupus exedens10528009
- Bazin's disease11354005
- Tuberculosis cutis indurativa11354005
- Tuberculous Bazin's disease11354005
- Tuberculous erythema induratum11354005
- Tuberculoma15202009
- Lobular panniculitis20196005
- Prosector's wart33893009
- Tuberculosis verrucosa cutis33893009
- Verruca necrogenica33893009
- Warty tuberculosis33893009
- Papulonecrotic tuberculid41156006
- Papulonecrotic tuberculide41156006
- Tuberculosis papulonecrotica41156006
- Tuberculous chancre63808004
- Cutaneous tuberculosis66986005
- Tuberculoderma66986005
- Tuberculosis cutis66986005
- Tuberculosis of skin66986005
- Erythema nodosum due to tuberculosis74610006
- Tuberculosis (TB) with erythema nodosum74610006
- Tuberculosis with erythema nodosum AND hypersensitivity reaction74610006
- Tuberculous erythema nodosum74610006
- Scrofuloderma82796002
- Tuberculosis colliquativa82796002
- Tuberculosis colliquativa cutis82796002
- Tuberculid123583002
- Tuberculide123583002
- Tuberculids123583002
- Tuberculosis with cutaneous hypersensitivity reaction123583002
- Infection after vaccination213317006
- Infection following immunisation213317006
- Infection following immunization213317006
- Infection following vaccination213317006
- Papular tuberculide238428001
- Nodular tuberculide238429009
- Cutaneous complication of BCG immunisation238430004
- Cutaneous complication of BCG immunization238430004
- Cutaneous complication of bacillus Calmette-Guerin immunisation238430004
- Cutaneous complication of bacillus Calmette-Guerin immunization238430004
- Acute tuberculous ulcer240380008
- Cutaneous tuberculous gumma240382000
- Metastatic tuberculous ulcer240382000
- Tuberculosis of skin and subcutaneous tissue271423008
- Infection caused by Mycobacterium bovis373437006
- Erythema nodosum caused by Bacteria402968000
- Erythema nodosum due to bacterial infection402968000
- BCG-induced lupus vulgaris402973006
- Bacillus Calmette-Guerin (BCG)-induced lupus vulgaris402973006
- Bacillus Calmette-Guerin-induced lupus vulgaris402973006
- BCG-induced scrofuloderma402974000
- Bacillus Calmette-Guerin (BCG)-induced scrofuloderma402974000
- Bacillus Calmette-Guerin-induced scrofuloderma402974000
- BCG-induced tuberculide402975004
- Bacillus Calmette-Guerin (BCG)-induced tuberculide402975004
- Bacillus Calmette-Guerin-induced tuberculide402975004
- Tuberculous abscess446123007
- Tuberculous abscess of neck447399004
- Lupus vulgaris of nose714394004
- Vaccination site lump863908005
UMLS
- BAZIN DISC0014741
- BAZINS DISC0014741
- Bazin DiseaseC0014741
- Bazin's DiseaseC0014741
- Bazin's diseaseC0014741
- Bazin's syndromeC0014741
- Bazins DiseaseC0014741
- Disease, BazinC0014741
- Disease, Bazin'sC0014741
- Erythema InduratumC0014741
- Erythema induratumC0014741
- Erythema induratum (disorder)C0014741
- Erythema induratum, tuberculousC0014741
- Induration erythemaC0014741
- Tuberculosis Cutis IndurativaC0014741
- Tuberculosis cutis indurativaC0014741
- Tuberculosis cutis indurativa (disorder)C0014741
- Tuberculosis indurativaC0014741
- Tuberculous Bazin's diseaseC0014741
- Tuberculous erythema induratumC0014741
- bazin's diseaseC0014741
- erythema induratumC0014741
- LV - Lupus vulgarisC0024131
- Lupus VulgarisC0024131
- Lupus exedensC0024131
- Lupus vulgarisC0024131
- Lupus vulgaris (disorder)C0024131
- Lupus vulgaris NOSC0024131
- Tuberculosis cutis luposaC0024131
- Tuberculosis luposa cutisC0024131
- Tuberculosis lupus exedensC0024131
- lupusC0024131
- lupus tuberculosisC0024131
- lupus vulgarisC0024131
- Lupus vulgaris of eyelidC2887040
- ScrofulodermaC0275934
- Scrofuloderma (disorder)C0275934
- Tuberculosis colliquativaC0275934
- Tuberculosis colliquativa cutisC0275934
- Tuberculosis of external earC2887041
- Tuberculosis of skin and subcutaneous tissueC0343426
- Tuberculosis of skin and subcutaneous tissue (disorder)C0343426
Clinical Terms
- Bacillus Calmette-Guerin-induced scrofuloderma
- Scrofuloderma
- Scrofuloderma (disorder)
- BAZIN DIS
- Tuberculosis papulonecrotica
- Lupus Vulgaris
- BCG-induced tuberculide
- Tuberculosis cutis indurativa (disorder)
- Bacillus Calmette-Guerin (BCG)-induced lupus vulgaris
- Tuberculous abscess of neck
- Vaccination site lump
- Cutaneous tuberculous gumma
- Tuberculosis cutis indurativa
- Tuberculosis verrucosa cutis
- Disease, Bazin's
- Tuberculosis colliquativa
- Cutaneous complication of BCG immunisation
- Lobular panniculitis
- Bazin Disease
- Tuberculosis of subcutaneous cellular tissue
- Disease, Bazin
- Tuberculosis of skin
- Tuberculous abscess
- LV - Lupus vulgaris
- Tuberculids
- Erythema induratum, tuberculous
- Lichen scrofulosorum
- Lupus vulgaris of eyelid
- BCG-induced scrofuloderma
- Lupus vulgaris NOS
- Erythema Induratum
- Bazin's Disease
- Infection following vaccination
- Tuberculosis cutis
- Tuberculosis (tb) of subcutaneous tissue
- Tuberculosis (TB) with erythema nodosum
- Tuberculous chancre
- Cutaneous complication of bacillus Calmette-Guerin immunization
- Lupus vulgaris (disorder)
- Tuberculosis lichenoides
- BCG-induced lupus vulgaris
- Cutaneous complication of bacillus Calmette-Guerin immunisation
- Tuberculosis of external ear
- Infection following immunization
- BAZINS DIS
- Tuberculosis of skin and subcutaneous tissue (disorder)
- Infection caused by Mycobacterium bovis
- Tuberculoderma
- Tuberculous erythema induratum
- Bacillus Calmette-Guerin (BCG)-induced tuberculide
- Tuberculosis (tb) verrucosa cutis
- Acute tuberculous ulcer
- Nodular tuberculide
- Bacillus Calmette-Guerin (BCG)-induced scrofuloderma
- lupus tuberculosis
- lupus
- Bazins Disease
- Tuberculosis cutis lichenoides
- Bacillus Calmette-Guerin-induced lupus vulgaris
- Bazin's syndrome
- Papulonecrotic tuberculide
- Erythema nodosum due to bacterial infection
- Tuberculosis with erythema nodosum AND hypersensitivity reaction
- Infection following immunisation
- Prosector's wart
- Lupus vulgaris of nose
- Cutaneous complication of BCG immunization
- Papulonecrotic tuberculid
- Induration erythema
- Tuberculosis luposa cutis
- Tuberculosis with cutaneous hypersensitivity reaction
- Tuberculid
- Infection after vaccination
- Bacillus Calmette-Guerin-induced tuberculide
- Tuberculosis cutis luposa
- Papular tuberculide
- Verruca necrogenica
- Tuberculoma
- Metastatic tuberculous ulcer
- Tuberculous Bazin's disease
- Erythema nodosum caused by Bacteria
- Tuberculous erythema nodosum
- Tuberculosis indurativa
- Erythema induratum (disorder)
- Tuberculide
- Warty tuberculosis
- Cutaneous tuberculosis
- Erythema nodosum due to tuberculosis
- Lupus exedens
- Tuberculosis colliquativa cutis
- Tuberculosis lupus exedens
Frequently Asked Questions
What is the ICD-10 code for tuberculosis of skin and subcutaneous tissue?
The ICD-10-CM code for tuberculosis of skin and subcutaneous tissue is A18.4. The full clinical description is "Tuberculosis of skin and subcutaneous tissue". A18.4 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code A18.4 mean?
ICD-10-CM code A18.4 represents “Tuberculosis of skin and subcutaneous tissue”. It is classified under Chapter 1: Certain Infectious and Parasitic Diseases and is a billable/specific code that can be used on a claim.
Is A18.4 a billable code?
Yes, A18.4 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is A18.4 in?
A18.4 is in Chapter 1: Certain Infectious and Parasitic Diseases (codes A00-B99).
What codes cannot be used with A18.4?
A18.4 has Excludes1 notes indicating codes that cannot be used together with it, including: certain localized infections - see body system-related chapters; congenital tuberculosis (P37.0); nonspecific reaction to test for tuberculosis without active tuberculosis (R76.1-); and 5 more.
Are additional codes required with A18.4?
Yes, when using A18.4, also report: resistance to antimicrobial drugs (Z16.-).
What SNOMED CT codes does A18.4 map to?
A18.4 maps to 30 SNOMED CT concepts: 240380008, 402973006, 402974000, 402975004, 11354005, and 25 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for A18.4?
A18.4 is linked to 6 UMLS Concept Unique Identifiers: C0014741, C0024131, C2887040, C0275934, C2887041, and 1 more. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does A18.4 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like tuberculosis of skin and subcutaneous tissue affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of A18.4?
A18.4 maps to the ICD-11 code: 1B12.8 (Cutaneous tuberculosis).
Automate ICD-10 Coding With AI
Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.
Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.