2026 ICD-10-CM Diagnosis Code J43.1Panlobular emphysema

ICD-10-CM Codes›J00–J99›J40-J4A›J43

ICD-10-CM J43.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

J43.1 is a billable ICD-10-CM diagnosis code for panlobular emphysema. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 190 through 192. Coders also document this condition as panacinar emphysema. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Chronic obstructive pulmonary disease and bronchiectasis.

Code Identity

ICD-10-CM Code
J43.1
Billable Status
Yes — Valid for Submission
Code Describes
Panlobular emphysema
Short Description
Panlobular emphysema
Same as the full description in the CMS dataset.
Parent Code
J43
Emphysema

Code Classification

ChapterJ00–J99Diseases of the respiratory system
SectionJ40-J4AChronic lower respiratory diseases
CategoryJ43Emphysema
This CodeJ43.1Panlobular emphysema

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Panacinar emphysema

Tabular List NotesGuidance

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

Inclusion Terms

  • Panacinar emphysema

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.

    • Emphysema(atrophic) (bullous) (chronic) (interlobular) (lung) (obstructive) (pulmonary) (senile) (vesicular)
      • panacinar
    • Emphysema(atrophic) (bullous) (chronic) (interlobular) (lung) (obstructive) (pulmonary) (senile) (vesicular)
      • panlobular

Clinical ClassificationClinical

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

CCSR RSP008
Chronic obstructive pulmonary disease and bronchiectasis
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Emphysema

    a pathological accumulation of air in tissues or organs.

  • Emphysematous Cholecystitis

    a variant of acute cholecystitis with inflammation of the gallbladder that is characterized by the pockets of gas in the gallbladder wall. it is due to secondary infection caused by gas-forming organisms, and has a high risk of perforation.

  • Emphysematous Pyelonephritis

    acute often necrotizing pyelonephritis characterized by accumulation of gas within and around renal parenchyma. emphysematous pyelonephritis is typically associated with bacterial infection in diabetes mellitus and immunocompromised patient.

  • Mediastinal Emphysema

    presence of air in the mediastinal tissues due to leakage of air from the tracheobronchial tree, usually as a result of trauma.

  • Pneumonia, Atypical Interstitial, of Cattle

    a cattle disease of uncertain cause, probably an allergic reaction.

  • Pulmonary Emphysema

    enlargement of air spaces distal to the terminal bronchioles where gas-exchange normally takes place. this is usually due to destruction of the alveolar wall. pulmonary emphysema can be classified by the location and distribution of the lesions.

  • Subcutaneous Emphysema

    presence of air or gas in the subcutaneous tissues of the body.

  • Gallbladder

    a storage reservoir for bile secretion. gallbladder allows the delivery of bile acids at a high concentration and in a controlled manner, via the cystic duct to the duodenum, for degradation of dietary lipid.

Patient EducationClinical

Emphysema

Emphysema is a type of COPD (chronic obstructive pulmonary disease). COPD is a group of lung diseases that make it hard to breathe and get worse over time. The other main type of COPD is chronic bronchitis. Most people with COPD have both emphysema and chronic bronchitis, but how severe each type is can be different from person to person.

The full article covers:

  • What is emphysema?
  • What causes emphysema?
  • Who is at risk for emphysema?
  • What are the symptoms of emphysema?
  • How is emphysema diagnosed?
  • What are the treatments for emphysema?
  • Can emphysema be prevented?

Read the full article at MedlinePlus

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

Convert J43.1 to ICD-9-CMHistory

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

ICD-9-CM
492.8 Emphysema NEC
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 J43.1Overview

Is J43.1 (Emphysema) a billable code?

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

What MS-DRG does J43.1 group to?

When panlobular emphysema is the principal diagnosis on an inpatient stay, it groups to MS-DRG 190, 191, 192, with relative weights from 0.6420 to 1.1077 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of J43.1?

Under the General Equivalence Mappings, panlobular emphysema converts to ICD-9-CM 492.8 (emphysema NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.