ICD-10-CM Code A18.84

Tuberculosis of heart

Version 2020 Billable Code

Valid for Submission

A18.84 is a billable code used to specify a medical diagnosis of tuberculosis of heart. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code A18.84 might also be used to specify conditions or terms like acute bacterial pericarditis, acute myocarditis - tuberculous, acute tuberculous pericarditis, constrictive pericarditis due to bacteria, constrictive pericarditis due to mycobacterium tuberculosis complex, fibrosis of pericardium, etc

Short Description:Tuberculosis of heart
Long Description:Tuberculosis of heart

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code A18.84:

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Tuberculous cardiomyopathy
  • Tuberculous endocarditis
  • Tuberculous myocarditis
  • Tuberculous pericarditis

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code A18.84 are found in the index:


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Acute bacterial pericarditis
  • Acute myocarditis - tuberculous
  • Acute tuberculous pericarditis
  • Constrictive pericarditis due to bacteria
  • Constrictive pericarditis due to Mycobacterium tuberculosis complex
  • Fibrosis of pericardium
  • Infective constrictive pericarditis
  • Pericarditis with pericardial effusion due to Mycobacterium tuberculosis complex
  • Tuberculosis of endocardium
  • Tuberculosis of heart
  • Tuberculosis of mediastinum
  • Tuberculosis of mediastinum
  • Tuberculosis of myocardium
  • Tuberculosis of pericardium

Diagnostic Related Groups

The ICD-10 code A18.84 is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2019 through 09/30/2020.


Convert A18.84 to ICD-9

  • 017.90 - TB of organ NEC-unspec (Approximate Flag)
  • 017.90 - TB of organ NEC-unspec (Combination Flag)
  • 420.0 - Ac pericardit in oth dis (Combination Flag)
  • 422.0 - Ac myocardit in oth dis (Combination Flag)
  • 424.91 - Endocarditis in oth dis (Combination Flag)
  • 425.8 - Cardiomyopath in oth dis (Combination Flag)

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

Heart Diseases

If you're like most people, you think that heart disease is a problem for others. But heart disease is the number one killer in the U.S. It is also a major cause of disability. There are many different forms of heart disease. The most common cause of heart disease is narrowing or blockage of the coronary arteries, the blood vessels that supply blood to the heart itself. This is called coronary artery disease and happens slowly over time. It's the major reason people have heart attacks.

Other kinds of heart problems may happen to the valves in the heart, or the heart may not pump well and cause heart failure. Some people are born with heart disease.

You can help reduce your risk of heart disease by taking steps to control factors that put you at greater risk:

  • Control your blood pressure
  • Lower your cholesterol
  • Don't smoke
  • Get enough exercise

NIH: National Heart, Lung, and Blood Institute

[Learn More]


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.

[Learn More]