2024 ICD-10-CM Diagnosis Code A15.9

Respiratory tuberculosis unspecified

ICD-10-CM Code:
ICD-10 Code for:
Respiratory tuberculosis unspecified
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Certain infectious and parasitic diseases
    • Tuberculosis
      • Respiratory tuberculosis

A15.9 is a billable diagnosis code used to specify a medical diagnosis of respiratory tuberculosis unspecified. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Unspecified diagnosis codes like A15.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

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

  • Active tuberculosis
  • Antibiotic resistant tuberculosis
  • Antibiotic resistant tuberculosis
  • Antibiotic resistant tuberculosis
  • Antibiotic resistant tuberculosis
  • Antibiotic resistant tuberculosis
  • Asymptomatic human immunodeficiency virus infection
  • Chronic tuberculosis
  • Ciprofloxacin resistant tuberculosis
  • Ethambutol resistant tuberculosis
  • Extensively drug resistant tuberculosis
  • Extreme drug resistant tuberculosis
  • Human immunodeficiency virus World Health Organization 2007 stage 1 co-occurrent with tuberculosis
  • Human immunodeficiency virus World Health Organization 2007 stage 2 co-occurrent with tuberculosis
  • Human immunodeficiency virus World Health Organization 2007 stage 3 co-occurrent with tuberculosis
  • Human immunodeficiency virus World Health Organization 2007 stage 4 co-occurrent with tuberculosis
  • Hypercalcemia due to tuberculosis
  • Infection due to Mycobacterium tuberculosis
  • Infection due to mycobacterium tuberculosis hominis
  • Maternal tuberculosis during pregnancy, childbirth and the puerperium
  • Multidrug resistant tuberculosis
  • Mycobacteriosis with AIDS
  • Respiratory tuberculosis
  • Respiratory tuberculosis, bacteriologically and histologically confirmed
  • Respiratory tuberculosis, not confirmed bacteriologically or histologically
  • Rifampicin resistant tuberculosis
  • Streptomycin resistant tuberculosis
  • Tuberculosis
  • Tuberculosis in mother complicating childbirth
  • Tuberculosis with AIDS
  • Tuberculous abscess
  • World Health Organization 2007 Human immunodeficiency virus infection clinical stage 1
  • World Health Organization 2007 Human immunodeficiency virus infection clinical stage 2
  • World Health Organization 2007 Human immunodeficiency virus infection clinical stage 3
  • World Health Organization 2007 Human immunodeficiency virus infection clinical stage 4

Clinical Classification

Clinical CategoryCCSR Category CodeInpatient Default CCSROutpatient Default CCSR
Other specified and unspecified lower respiratory diseaseRSP016N - Not default inpatient assignment for principal diagnosis or first-listed diagnosis.N - Not default outpatient assignment for principal diagnosis or first-listed diagnosis.
TuberculosisINF001Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.

Clinical Information

  • Erythema Induratum

    a type of panniculitis characterized histologically by the presence of granulomas, vasculitis, and necrosis. it is traditionally considered to be the tuberculous counterpart of nodular vasculitis, but is now known to occur without tuberculous precedent. it is seen most commonly in adolescent and menopausal women, is initiated or exacerbated by cold weather, and typically presents as one or more recurrent erythrocyanotic nodules or plaques on the calves. the nodules may progress to form indurations, ulcerations, and scars.
  • Extensively Drug-Resistant Tuberculosis

    tuberculosis resistant to isoniazid and rifampin and at least three of the six main classes of second-line drugs (aminoglycosides; polypeptide agents; fluoroquinolones; thioamides; cycloserine; and para-aminosalicylic acid) as defined by the cdc.
  • Hospitals, Chronic Disease

    hospitals which provide care to patients with long-term illnesses.
  • Latent Tuberculosis

    the dormant form of tuberculosis where the person shows no obvious symptoms and no sign of the causative agent (mycobacterium tuberculosis) in the sputum despite being positive for tuberculosis infection skin test.
  • Peritonitis, Tuberculous

    a form of peritonitis seen in patients with tuberculosis, characterized by lesion either as a miliary form or as a pelvic mass on the peritoneal surfaces. most patients have ascites, abdominal swelling, abdominal pain, and other systemic symptoms such as fever; weight loss; and anemia.
  • Tuberculosis

    any of the infectious diseases of man and other animals caused by species of mycobacterium tuberculosis.
  • Tuberculosis Societies

    voluntary agencies concerned with prevention and treatment of tuberculosis.
  • Tuberculosis Vaccines

    vaccines or candidate vaccines used to prevent or treat tuberculosis.
  • Tuberculosis, Avian

    a variety of tuberculosis affecting various birds, including chickens and ducks. it is caused by mycobacterium avium and characterized by tubercles consisting principally of epithelioid cells.
  • Tuberculosis, Bovine

    an infection of cattle caused by mycobacterium bovis. it is transmissible to man and other animals.
  • Tuberculosis, Cardiovascular

    pathological conditions of the cardiovascular system caused by infection of mycobacterium tuberculosis. tuberculosis involvement may include the heart; the blood vessels; or the pericardium.
  • Tuberculosis, Central Nervous System

    tuberculosis of the brain, spinal cord, or meninges (tuberculosis, meningeal), most often caused by mycobacterium tuberculosis and rarely by mycobacterium bovis. the infection may be limited to the nervous system or coexist in other organs (e.g., tuberculosis, pulmonary). the organism tends to seed the meninges causing a diffuse meningitis and leads to the formation of tuberculoma, which may occur within the brain, spinal cord, or perimeningeal spaces. tuberculous involvement of the vertebral column (tuberculosis, spinal) may result in nerve root or spinal cord compression. (from adams et al., principles of neurology, 6th ed, pp717-20)
  • Tuberculosis, Cutaneous

    tuberculosis of the skin. it includes scrofuloderma and tuberculid, but not lupus vulgaris.
  • Tuberculosis, Endocrine

    infection of the endocrine glands with species of mycobacterium, most often mycobacterium tuberculosis.
  • Tuberculosis, Extrapulmonary

    mycobacterium infections of organs other than the lung.
  • Tuberculosis, Female Genital

    mycobacterium infections of the female reproductive tract (genitalia, female).
  • Tuberculosis, Gastrointestinal

    tuberculosis that involves any region of the gastrointestinal tract, mostly in the distal ileum and the cecum. in most cases, mycobacterium tuberculosis is the pathogen. clinical features include abdominal pain; fever; and palpable mass in the ileocecal area.
  • Tuberculosis, Hepatic

    infection of the liver with species of mycobacterium, most often mycobacterium tuberculosis. it is characterized by localized small tuberculous miliary lesions or tumor-like mass (tuberculoma), and abnormalities in liver function tests.
  • Tuberculosis, Laryngeal

    tuberculosis involving the larynx, producing ulceration of the vocal cords and the laryngeal mucosa.
  • Tuberculosis, Lymph Node

    infection of the lymph nodes by tuberculosis. tuberculous infection of the cervical lymph nodes is scrofula.
  • Tuberculosis, Male Genital

    mycobacterium infections of the male reproductive tract (genitalia, male).
  • Tuberculosis, Meningeal

    a form of bacterial meningitis caused by mycobacterium tuberculosis or rarely mycobacterium bovis. the organism seeds the meninges and forms microtuberculomas which subsequently rupture. the clinical course tends to be subacute, with progressions occurring over a period of several days or longer. headache and meningeal irritation may be followed by seizures, cranial neuropathies, focal neurologic deficits, somnolence, and eventually coma. the illness may occur in immunocompetent individuals or as an opportunistic infection in the acquired immunodeficiency syndrome and other immunodeficiency syndromes. (from adams et al., principles of neurology, 6th ed, pp717-9)
  • Tuberculosis, Miliary

    an acute form of tuberculosis in which minute tubercles are formed in a number of organs of the body due to dissemination of the bacilli through the blood stream.
  • Tuberculosis, Multidrug-Resistant

    tuberculosis resistant to chemotherapy with two or more antitubercular agents, including at least isoniazid and rifampicin. the problem of resistance is particularly troublesome in tuberculous opportunistic infections associated with hiv infections. it requires the use of second line drugs which are more toxic than the first line regimens. tb with isolates that have developed further resistance to at least three of the six classes of second line drugs is defined as extensively drug-resistant tuberculosis.
  • Tuberculosis, Ocular

    tuberculous infection of the eye, primarily the iris, ciliary body, and choroid.
  • Tuberculosis, Oral

    tuberculosis of the mouth, tongue, and salivary glands.
  • Tuberculosis, Osteoarticular

    tuberculosis of the bones or joints.
  • Tuberculosis, Pleural

    tuberculosis of the serous membrane lining the thoracic cavity and surrounding the lungs.
  • Tuberculosis, Pulmonary

    mycobacterium infections of the lung.
  • Tuberculosis, Renal

    infection of the kidney with species of mycobacterium.
  • Tuberculosis, Spinal

    osteitis or caries of the vertebrae, usually occurring as a complication of tuberculosis of the lungs.
  • Tuberculosis, Splenic

    infection of the spleen with species of mycobacterium.
  • Tuberculosis, Urogenital

    a general term for mycobacterium infections of any part of the urogenital system in either the male or the female.
  • Mycobacterium tuberculosis

    a species of gram-positive, aerobic bacteria that produces tuberculosis in humans, other primates, cattle; dogs; and some other animals which have contact with humans. growth tends to be in serpentine, cordlike masses in which the bacilli show a parallel orientation.
  • Mycobacterium bovis

    the bovine variety of the tubercle bacillus. it is called also mycobacterium tuberculosis var. bovis.
  • Lupus Vulgaris

    a form of cutaneous tuberculosis. it is seen predominantly in women and typically involves the nasal mucosa; buccal mucosa; and conjunctival mucosa.
  • Mycobacterium

    a genus of gram-positive, aerobic bacteria. most species are free-living in soil and water, but the major habitat for some is the diseased tissue of warm-blooded hosts.
  • Tuberculous Abscess

    an abscess resulting from infection by mycobacterium tuberculosis.

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert A15.9 to ICD-9-CM

  • ICD-9-CM Code: 012.80 - Resp TB NEC-unspec
    Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Patient Education


What is tuberculosis (TB)?

Tuberculosis (TB) is a bacterial disease that usually attacks the lungs. But it can also attack other parts of the body, including the kidneys, spine, and brain.

Not everyone infected with TB bacteria (germs) becomes sick. So, there are two types of TB conditions:

  • Latent TB infection, where the TB germs live in your body but don't make you sick.
  • TB disease (active TB) where you get sick from the TB germs. TB disease can almost always be cured with antibiotics. But if it's not treated properly, it can be fatal.

TB is found in the U.S., but it is more common in certain other countries.

What causes tuberculosis (TB)?

TB is caused by bacteria (germs) called Mycobacterium tuberculosis. The germs spread from person to person through the air. People who have TB disease in their throat or lungs spread the germs in the air when they cough, sneeze, talk, or sing. If you breathe in the air that has the germs, you can get TB. TB is not spread by touching, kissing, or sharing food or dishes.

You're more likely to catch TB from people you live or work with than from people you see for shorter amounts of time.

Who is more likely to get infected with tuberculosis (TB) germs?

Anyone who is near a person with TB disease can get infected with the germs. You are more likely to be near someone with TB disease if you:

  • Were born in or often travel to countries where TB disease is common
  • Are a health care worker
  • Work or live in a place where TB is more common, such as shelters for people without homes, jails, and nursing homes

Who is more likely to develop TB disease?

Certain people are more likely to get sick with TB disease after they get infected. They include people who:

  • Have HIV
  • Became infected with TB in the last 2 years
  • Have other diseases, such as diabetes, that make it hard for your body to fight TB germs
  • Have alcohol use disorder or inject illegal drugs
  • Were not treated correctly for TB in the past
  • Are under age 5
  • Are an older adult

What are the symptoms of tuberculosis (TB)?

Most people who have TB germs in their bodies don't get sick with TB disease. Instead, they have latent TB infection. With a latent TB infection, you:

  • Don't have symptoms
  • Can't spread TB to others
  • Could get sick with active TB disease in the future if your immune system becomes weak for another reason
  • Need to take medicine to prevent getting sick with active TB disease in the future

If you have TB disease, the TB germs are active, meaning that they are growing (multiplying) inside your body and making you sick. If the TB is growing in your lungs or throat, you can spread the TB germs to other people. You can get sick with TB disease weeks to years after you're infected with TB germs.

With TB disease, your symptoms will depend on where the TB is growing in your body:

  • General symptoms may include:
    • Chills and fever
    • Night sweats (heavy sweating during sleep)
    • Losing weight without trying
    • Loss of appetite
    • Weakness or fatigue
  • Symptoms from TB disease in your lungs may include:
    • A cough that lasts longer than 3 weeks
    • Coughing up blood or sputum (a thick mucus from the lungs)
    • Chest pain

How is tuberculosis (TB) diagnosed?

Your health care provider or your local health department can test you to find out if you have TB germs in your body. They will give you either a TB skin or blood test.

If your test shows that you have TB germs, you'll need to have other tests to see if the germs are actively growing:

  • Tests for TB disease in the lungs usually include testing samples of your sputum and having chest x-rays.
  • Tests for TB disease in other parts of your body may include tests of urine and tissue samples.

You may need a TB test if you have symptoms of TB disease or if you are at high risk because you are more likely to be near someone with TB disease.

What is the treatment for tuberculosis (TB)?

The treatment for both latent TB infection and TB disease is antibiotics. To make sure you get rid of all the TB germs in your body, it's very important to follow the directions for taking your medicine.

If you don't follow the directions, the TB germs in your body could change and become antibiotic resistant. That means the medicine may stop working and your TB may become hard to cure.

  • For latent TB infections, you usually take medicines for 3 to 9 months. Treatment helps make sure you don't get TB disease in the future.
  • For active TB disease, you usually need to take medicines for 6 to 12 months. Treatment will almost always cure you if you take your pills the right way.
  • For TB disease in your lungs or throat, you'll need to stay home for a few weeks, so you don't spread disease to other people. You can protect the people you live with by:
    • Covering your nose and mouth.
    • Opening windows when possible.
    • Not getting too close to them.

By following medical advice for TB testing and treatment, you can keep yourself healthy and help stop the spread of TB.

Centers for Disease Control and Prevention

[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.


[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.