2025
ICD-10-CM
Diagnosis
Code

A18.4 Tuberculosis of skin and subcutaneous tissue

  • Billable
  • 2016–2025

A18.4 is a billable/specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Tuberculosis of skin and subcutaneous tissue.

Inclusion term

  • Erythema induratum, tuberculous

  • Lupus exedens

  • Lupus vulgaris NOS

  • Lupus vulgaris of eyelid

  • Scrofuloderma

  • Tuberculosis of external ear

Type 2 excludes

  • Lupus erythematosus (L93.-)

  • Systemic lupus erythematosus (M32.-)

Versions

  1. 2025

    Code changed

    • Inclusion term

        • Erythema induratum, tuberculous
        • Lupus excedens
        • Lupus vulgaris NOS
        • Lupus vulgaris of eyelid
        • Scrofuloderma
        • Tuberculosis of external ear
        • Erythema induratum, tuberculous
        • Lupus exedens
        • Lupus vulgaris NOS
        • Lupus vulgaris of eyelid
        • Scrofuloderma
        • Tuberculosis of external ear

  2. 2024

    No changes

  3. 2023

    No changes

  4. 2022

    No changes

  5. 2021

    No changes

  6. 2020

    Code changed

    • Type 2 excludes

        • lupus erythematosus (L93.-)
        • lupus NOS (M32.9)
        • systemic (M32.-)
        • lupus erythematosus (L93.-)
        • systemic lupus erythematosus (M32.-)

  7. 2019

    No changes

  8. 2018

    No changes

  9. 2017

    No changes

  10. 2016

    New code