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A15.4 ICD-10-CA code: Tuberculosis of intrathoracic lymph nodes, confirmed bacteriologically and histologically

A15.4 is the ICD-10-CA code for “Tuberculosis of intrathoracic lymph nodes, confirmed bacteriologically and histologically” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.

Official description

A15.4

Tuberculosis of intrathoracic lymph nodes, confirmed bacteriologically and histologically

Short description: TB intrathor lymph confirm bact and hist

ICD-10-CA · Canada · Also written A154

Index terms

Entries in CIHI’s alphabetical index that lead to A15.4. Searching the index by the condition the note names is how coders reach this code.

  • Tuberculosis, tubercular, tuberculous (caseous) (degeneration) (gangrene) (necrosis), hilar lymph nodes, with bacteriological and histological confirmation
  • Tuberculosis, tubercular, tuberculous (caseous) (degeneration) (gangrene) (necrosis), adenopathy, tracheobronchial, with bacteriological and histological confirmation
  • Tuberculosis, tubercular, tuberculous (caseous) (degeneration) (gangrene) (necrosis), mediastinal lymph gland or node, with bacteriological and histological confirmation
  • Tuberculosis, tubercular, tuberculous (caseous) (degeneration) (gangrene) (necrosis), tracheobronchial, lymph gland or node, with bacteriological and histological confirmation
  • Tuberculosis, tubercular, tuberculous (caseous) (degeneration) (gangrene) (necrosis), trachea, tracheal, lymph gland or node, with bacteriological and histological confirmation
  • Tuberculosis, tubercular, tuberculous (caseous) (degeneration) (gangrene) (necrosis), lymph gland or node (peripheral), hilar, with bacteriological and histological confirmation
  • Tuberculosis, tubercular, tuberculous (caseous) (degeneration) (gangrene) (necrosis), bronchi, bronchial, bronchus, gland or node, with bacteriological and histological confirmation
  • Tuberculosis, tubercular, tuberculous (caseous) (degeneration) (gangrene) (necrosis), lymph gland or node (peripheral), bronchial, with bacteriological and histological confirmation
  • Tuberculosis, tubercular, tuberculous (caseous) (degeneration) (gangrene) (necrosis), lymph gland or node (peripheral), mediastinal, with bacteriological and histological confirmation
  • Tuberculosis, tubercular, tuberculous (caseous) (degeneration) (gangrene) (necrosis), lymph gland or node (peripheral), intrathoracic, with bacteriological and histological confirmation
  • Tuberculosis, tubercular, tuberculous (caseous) (degeneration) (gangrene) (necrosis), bronchi, bronchial, bronchus, lymph gland or node, with bacteriological and histological confirmation
  • Tuberculosis, tubercular, tuberculous (caseous) (degeneration) (gangrene) (necrosis), lymph gland or node (peripheral), tracheobronchial, with bacteriological and histological confirmation

Notes for A15.4

As CIHI prints them, with any note A15.4 takes from the headings above it.

Includes

  • Tuberculosis of lymph nodes: hilar, mediastinal, tracheobronchial — confirmed bacteriologically and histologically
  • Infections due to Mycobacterium tuberculosis and Mycobacterium bovisFrom A15-A19 Tuberculosis
  • Diseases generally recognized as communicable or transmissibleFrom Chapter 1: Certain infectious and parasitic diseases (A00-B99)

Use additional code

Add a code for this detail when the note documents it.

  • Use additional code (U82-U84) to identify resistance to antimicrobial drugsFrom Chapter 1: Certain infectious and parasitic diseases (A00-B99)

Excludes

Conditions classified elsewhere.

  • Specified as primary (A15.7)
  • Congenital tuberculosis (P37.0)pneumoconiosis associated with tuberculosis (J65)sequelae of tuberculosis (B90.-)silicotuberculosis (J65)From A15-A19 Tuberculosis
  • Carrier or suspected carrier of infectious disease (Z22.-)certain localized infections - see body system-related chaptersinfectious and parasitic diseases:• complicating pregnancy, childbirth and the puerperium [except obstetrical tetanus] (O98.-)• specific to the perinatal period [except tetanus neonatorum, whooping cough, congenital syphilis, perinatal gonococcal infection and perinatal human immunodeficiency virus [HIV] disease] (P35-P39)influenza and other acute respiratory infections (J00-J22)From Chapter 1: Certain infectious and parasitic diseases (A00-B99)

Where A15.4 sits

  1. 1ChapterChapter 1: Certain infectious and parasitic diseases (A00-B99)
  2. 2Block A15-A19Tuberculosis
  3. 3Category A15Respiratory tuberculosis, bacteriologically and histologically confirmed
  4. 4Valid code A15.4Tuberculosis of intrathoracic lymph nodes, confirmed bacteriologically and histologically

Source and release

Data release
ICD-10-CA · FY 2026–2027
Effective date
Apr 1, 2026
Publisher
CIHI

This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.

See A15.4 in the CIHI source

Frequently asked questions

What does ICD-10-CA code A15.4 mean?

A15.4 is the ICD-10-CA code for “Tuberculosis of intrathoracic lymph nodes, confirmed bacteriologically and histologically” in CIHI’s ICD-10-CA FY 2026–2027 release.

Where is A15.4 in ICD-10-CA?

A15.4 sits under A15 Respiratory tuberculosis, bacteriologically and histologically confirmed, within A15-A19 Tuberculosis, within Chapter 1: Certain infectious and parasitic diseases (A00-B99).

What coding notes apply to A15.4?

ICD-10-CA lists Includes, Excludes, Use additional code notes for A15.4, including those from the headings it sits under. They are listed on this page with where each one comes from.

Which ICD-10-CA release does this page use?

It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.

Codes beside A15.4

A15.0Tuberculosis of lung, confirmed by sputum microscopy with or without cultureA15.1Tuberculosis of lung, confirmed by culture onlyA15.2Tuberculosis of lung, confirmed histologicallyA15.3Tuberculosis of lung, confirmed by unspecified meansA15.5Tuberculosis of larynx, trachea and bronchus confirmed bacteriologically and histologicallyA15.6Tuberculous pleurisy, confirmed bacteriologically and histologicallyA15.7Primary respiratory tuberculosis, confirmed bacteriologically and histologicallyA15.8Other respiratory tuberculosis, confirmed bacteriologically and histologicallyA15.9Respiratory tuberculosis unspecified, confirmed bacteriologically and histologically