2026 ICD-10-CM Diagnosis Code A15.7Primary respiratory tuberculosis

ICD-10-CM Codes›A00–B99›A15-A19›A15

ICD-10-CM A15.7
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A15.7 is a billable ICD-10-CM diagnosis code for primary respiratory tuberculosis. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 177 through 179, 974 through 976. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 50 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified lower respiratory disease and Tuberculosis.

Code Identity

ICD-10-CM Code
A15.7
Billable Status
Yes — Valid for Submission
Code Describes
Primary respiratory tuberculosis
Short Description
Primary respiratory tuberculosis
Same as the full description in the CMS dataset.
Parent Code
A15
Respiratory tuberculosis

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA15-A19Tuberculosis
CategoryA15Respiratory tuberculosis
This CodeA15.7Primary respiratory tuberculosis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Active tuberculosis
  • Acute tuberculosis
  • Antibiotic resistant tuberculosis
  • Bacterial pleurisy
  • Calcified granuloma of lung
  • Ciprofloxacin resistant tuberculosis
  • Ethambutol resistant tuberculosis
  • Extensively drug resistant tuberculosis
  • Extreme drug resistant tuberculosis
  • Finding by inspection
  • Ghon complex
  • Infection caused by Mycobacterium tuberculosis
  • Infection caused by mycobacterium tuberculosis hominis
  • Multidrug resistant tuberculosis
  • Neonatal tuberculosis
  • Primary progressive tuberculosis
  • Primary tuberculosis
  • Primary tuberculous complex
  • Primary tuberculous complex confirmed
  • Primary tuberculous complex confirmed by culture
  • Primary tuberculous complex confirmed by microscopic examination
  • Primary tuberculous complex confirmed histologically
  • Primary tuberculous complex with bacteriological or histological examination results unknown
  • Rifampicin resistant tuberculosis
  • Sequelae of tuberculosis
  • Streptomycin resistant tuberculosis
  • Tuberculosis
  • Tuberculosis of pleura
  • Tuberculous abscess
  • Tuberculous pleurisy in primary progressive tuberculosis

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR RSP016
Other specified and unspecified lower respiratory disease
Default principal diagnosis: inpatient No · outpatient No
CCSR INF001
Tuberculosis
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • 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.

Patient EducationClinical

Tuberculosis

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.

The full article covers:

  • What is tuberculosis (TB)?
  • What causes tuberculosis (TB)?
  • Who is more likely to get infected with tuberculosis (TB) germs?
  • Who is more likely to develop TB disease?
  • What are the symptoms of tuberculosis (TB)?
  • How is tuberculosis (TB) diagnosed?
  • What is the treatment for tuberculosis (TB)?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert A15.7 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
010.90 Primary TB NOS-unspec
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About A15.7Overview

What is the ICD-10 code for primary respiratory tuberculosis?

The ICD-10-CM code for primary respiratory tuberculosis is A15.7 (sometimes written as A157). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

Is A15.7 (Respiratory tuberculosis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report primary respiratory tuberculosis on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does A15.7 group to?

When primary respiratory tuberculosis is the principal diagnosis on an inpatient stay, it groups to MS-DRG 177, 178, 179, 974, 975, 976, with relative weights from 0.7550 to 2.8860 depending on complications. Higher weights mean higher Medicare reimbursement.

Is A15.7 a CC or MCC?

CMS lists A15.7 as a CC (complication or comorbidity) for FY 2026. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 50 closely related codes in its exclusion list.

What is the ICD-9 equivalent of A15.7?

Under the General Equivalence Mappings, primary respiratory tuberculosis converts to ICD-9-CM 010.90 (primary TB NOS-unspec). The mapping is approximate, so confirm the match fits the documentation.