2026 ICD-10-CM Diagnosis Code A15.0Tuberculosis of lung

ICD-10-CM Codes›A00–B99›A15-A19›A15

ICD-10-CM A15.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A15.0 is a billable ICD-10-CM diagnosis code for tuberculosis of lung. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Tuberculosis.

Code Identity

ICD-10-CM Code
A15.0
Billable Status
Yes — Valid for Submission
Code Describes
Tuberculosis of lung
Short Description
Tuberculosis of lung
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 CodeA15.0Tuberculosis of lung

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Abscess of lung
  • Antibiotic resistant tuberculosis
  • Inactive tuberculosis
  • Inactive tuberculosis of lung
  • Infiltrative lung tuberculosis
  • Isoniazid resistant tuberculosis
  • Isoniazid resistant tuberculosis of lung
  • Mycobacterial pneumonia
  • Nodular tuberculosis of lung
  • Pulmonary tuberculosis
  • Reactivation tuberculosis
  • Reinfection pulmonary tuberculosis
  • Reinfection respiratory tuberculosis
  • Relapse pulmonary tuberculosis
  • Relapse respiratory tuberculosis
  • Tuberculosis of lung with cavitation
  • Tuberculosis of lung with involvement of bronchus
  • Tuberculosis of lung, bacteriological and histological examination not done
  • Tuberculosis of lung, bacteriologically and histologically negative
  • Tuberculosis of lung, confirmed by culture only
  • Tuberculosis of lung, confirmed by sputum microscopy with or without culture
  • Tuberculosis of lung, confirmed histologically
  • Tuberculous abscess
  • Tuberculous abscess of lung
  • Tuberculous fibrosis of lung
  • Tuberculous pneumonia
  • Tuberculous pneumothorax

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Tuberculous bronchiectasis
  • Tuberculous fibrosis of lung
  • Tuberculous pneumonia
  • Tuberculous pneumothorax

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Aneurysm(anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)
      • Rasmussen NEC
    • Assmann's focus NEC
    • Hemorrhage, hemorrhagic(concealed)
      • tuberculous NEC
    • Tuberculosis, tubercular, tuberculous(calcification) (calcified) (caseous) (chromogenic acid-fast bacilli) (degeneration) (fibrocaseous) (fistula) (interstitial) (isolated circumscribed lesions) (necrosis) (parenchymatous) (ulcerative)
      • pulmonary (cavitated) (fibrotic) (infiltrative) (nodular)

Clinical ClassificationClinical

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

CCSR INF001
Tuberculosis
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Tuberculous Abscess

    an abscess resulting from infection by mycobacterium tuberculosis.

  • Tuberculous Fibrosis of Lung

    scarring of the lung parenchyma caused by pulmonary 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 A15.0 to ICD-9-CMHistory

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

ICD-9-CM
011.90 Pulmonary 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 A15.0Overview

Is A15.0 (Respiratory tuberculosis) a billable code?

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

What MS-DRG does A15.0 group to?

When tuberculosis of lung 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.

What is the ICD-9 equivalent of A15.0?

Under the General Equivalence Mappings, tuberculosis of lung converts to ICD-9-CM 011.90 (pulmonary TB NOS-unspec). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[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.