ICD-10-CM Code A18

Tuberculosis of other organs

Version 2020 Non-Billable Code

Not Valid for Submission

A18 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of tuberculosis of other organs. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

Short Description:Tuberculosis of other organs
Long Description:Tuberculosis of other organs

Consider the following ICD-10 codes with a higher level of specificity:

  • A18.0 - Tuberculosis of bones and joints
  • A18.01 - Tuberculosis of spine
  • A18.02 - Tuberculous arthritis of other joints
  • A18.03 - Tuberculosis of other bones
  • A18.09 - Other musculoskeletal tuberculosis
  • A18.1 - Tuberculosis of genitourinary system
  • A18.10 - Tuberculosis of genitourinary system, unspecified
  • A18.11 - Tuberculosis of kidney and ureter
  • A18.12 - Tuberculosis of bladder
  • A18.13 - Tuberculosis of other urinary organs
  • 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 - Tuberculosis of eye, 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
  • A18.81 - Tuberculosis of thyroid gland
  • A18.82 - Tuberculosis of other endocrine glands
  • A18.83 - Tuberculosis of digestive tract organs, not elsewhere classified
  • A18.84 - Tuberculosis of heart
  • A18.85 - Tuberculosis of spleen
  • A18.89 - Tuberculosis of other sites

Code Classification

  • Certain infectious and parasitic diseases (A00–B99)
    • Tuberculosis (A15-A19)
      • Tuberculosis of other organs (A18)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Tuberculosis (TB) is a disease caused by bacteria called Mycobacterium tuberculosis. The bacteria usually attack the lungs, but they can also damage other parts of the body.

TB spreads through the air when a person with TB of the lungs or throat coughs, sneezes, or talks. If you have been exposed, you should go to your doctor for tests. You are more likely to get TB if you have a weak immune system.

Symptoms of TB in the lungs may include

  • A bad cough that lasts 3 weeks or longer
  • Weight loss
  • Loss of appetite
  • Coughing up blood or mucus
  • Weakness or fatigue
  • Fever
  • Night sweats

Skin tests, blood tests, x-rays, and other tests can tell if you have TB. If not treated properly, TB can be deadly. You can usually cure active TB by taking several medicines for a long period of time.

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