2019 ICD-10-CM Diagnosis Code A18.4

Tuberculosis of skin and subcutaneous tissue

Applicable To
  • Erythema induratum, tuberculous
  • Lupus excedens
  • Lupus vulgaris NOS
  • Lupus vulgaris of eyelid
  • Scrofuloderma
  • Tuberculosis of external ear
Type 2 Excludes
Type 2 Excludes Help
A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (A18.4) and the excluded code together.
  • lupus erythematosus (
    ICD-10-CM Diagnosis Code L93
    • L93 Lupus erythematosus
      • L93.0 Discoid lupus erythematosus
      • L93.1 Subacute cutaneous lupus erythematosus
      • L93.2 Other local lupus erythematosus
  • lupus NOS (
    ICD-10-CM Diagnosis Code M32.9

    Systemic lupus erythematosus, unspecified

      2016 2017 2018 2019 Billable/Specific Code
    Applicable To
    • SLE NOS
    • Systemic lupus erythematosus NOS
    • Systemic lupus erythematosus without organ involvement
  • systemic (
    ICD-10-CM Diagnosis Code M32
    • M32 Systemic lupus erythematosus (SLE)
      • M32.0 Drug-induced systemic lupus erythematosus
      • M32.1 Systemic lupus erythematosus with organ or sy...
        • M32.10 Systemic lupus erythematosus, organ or system...
        • M32.11 Endocarditis in systemic lupus erythematosus
        • M32.12 Pericarditis in systemic lupus erythematosus
        • M32.13 Lung involvement in systemic lupus erythemato...
        • M32.14 Glomerular disease in systemic lupus erythema...
        • M32.15 Tubulo-interstitial nephropathy in systemic l...
        • M32.19 Other organ or system involvement in systemic...
      • M32.8 Other forms of systemic lupus erythematosus
      • M32.9 Systemic lupus erythematosus, unspecified
The following code(s) above A18.4 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to A18.4:
  • A00-B99
    2019 ICD-10-CM Range A00-B99

    Certain infectious and parasitic diseases

    • diseases generally recognized as communicable or transmissible
    Type 1 Excludes
    • certain localized infections - see body system-related chapters
    Type 2 Excludes
    • carrier or suspected carrier of infectious disease (Z22.-)
    • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
    • infectious and parasitic diseases specific to the perinatal period (P35-P39)
    • influenza and other acute respiratory infections (J00-J22)
    Use Additional
    • code to identify resistance to antimicrobial drugs (Z16.-)
    Certain infectious and parasitic diseases
  • A15-A19
    2019 ICD-10-CM Range A15-A19


    • infections due to Mycobacterium tuberculosis and Mycobacterium bovis
    Type 1 Excludes
    • congenital tuberculosis (P37.0)
    • nonspecific reaction to test for tuberculosis without active tuberculosis (R76.1-)
    • pneumoconiosis associated with tuberculosis, any type in A15 (J65)
    • positive PPD (R76.11)
    • positive tuberculin skin test without active tuberculosis (R76.11)
    • sequelae of tuberculosis (B90.-)
    • silicotuberculosis (J65)
Approximate Synonyms Clinical Information ICD-10-CM A18.4 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):

Convert A18.4 to ICD-9-CM

Code History
Code annotations containing back-references to A18.4:

Diagnosis Index entries containing back-references to A18.4:

ICD-10-CM Codes Adjacent To A18.4
A18.14 Tuberculosis of prostate
A18.15 Tuberculosis of other male genital organs
A18.16 Tuberculosis of cervix
A18.17 Tuberculous female pelvic inflammatory disease
A18.18 Tuberculosis of other female genital organs
A18.2 Tuberculous peripheral lymphadenopathy
A18.3 Tuberculosis of intestines, peritoneum and mesenteric glands
A18.31 Tuberculous peritonitis
A18.32 Tuberculous enteritis
A18.39 Retroperitoneal tuberculosis
A18.4 Tuberculosis of skin and subcutaneous tissue
A18.5 Tuberculosis of eye
A18.50 …… unspecified
A18.51 Tuberculous episcleritis
A18.52 Tuberculous keratitis
A18.53 Tuberculous chorioretinitis
A18.54 Tuberculous iridocyclitis
A18.59 Other tuberculosis of eye
A18.6 Tuberculosis of (inner) (middle) ear
A18.7 Tuberculosis of adrenal glands
A18.8 Tuberculosis of other specified organs

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.