2026 ICD-10-CM Diagnosis Code J41.1Mucopurulent chronic bronchitis

ICD-10-CM Codes›J00–J99›J40-J4A›J41

ICD-10-CM J41.1
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

J41.1 is a billable ICD-10-CM diagnosis code for mucopurulent chronic bronchitis. 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 chronic suppuration of bronchus. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Chronic obstructive pulmonary disease and bronchiectasis.

Code Identity

ICD-10-CM Code
J41.1
Billable Status
Yes — Valid for Submission
Code Describes
Mucopurulent chronic bronchitis
Short Description
Mucopurulent chronic bronchitis
Same as the full description in the CMS dataset.
Parent Code
J41
Simple and mucopurulent chronic bronchitis

Code Classification

ChapterJ00–J99Diseases of the respiratory system
SectionJ40-J4AChronic lower respiratory diseases
CategoryJ41Simple and mucopurulent chronic bronchitis
This CodeJ41.1Mucopurulent chronic bronchitis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chronic suppuration of bronchus
  • Fetid chronic bronchitis
  • Mucopurulent chronic bronchitis
  • Purulent bronchitis

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.

    • Bronchitis(diffuse) (fibrinous) (hypostatic) (infective) (membranous)
      • chronic
        • mucopurulent
    • Bronchitis(diffuse) (fibrinous) (hypostatic) (infective) (membranous)
      • chronic
        • purulent
    • Bronchitis(diffuse) (fibrinous) (hypostatic) (infective) (membranous)
      • fetid
    • Bronchitis(diffuse) (fibrinous) (hypostatic) (infective) (membranous)
      • mucopurulent (chronic) (recurrent)
    • Bronchitis(diffuse) (fibrinous) (hypostatic) (infective) (membranous)
      • pituitous
    • Bronchitis(diffuse) (fibrinous) (hypostatic) (infective) (membranous)
      • purulent (chronic) (recurrent)
    • Bronchitis(diffuse) (fibrinous) (hypostatic) (infective) (membranous)
      • putrid
    • Bronchitis(diffuse) (fibrinous) (hypostatic) (infective) (membranous)
      • suppurative (chronic)

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

Patient EducationClinical

Chronic Bronchitis

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

Read the full article at MedlinePlus

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

Convert J41.1 to ICD-9-CMHistory

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

ICD-9-CM
491.1 Mucopurul chr bronchitis
Exact Match The mapping is direct, with no qualifiers.

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 J41.1Overview

Is J41.1 (Simple and mucopurulent chronic bronchitis) a billable code?

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

What MS-DRG does J41.1 group to?

When mucopurulent chronic bronchitis 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 J41.1?

Under the General Equivalence Mappings, mucopurulent chronic bronchitis converts to ICD-9-CM 491.1 (mucopurul chr bronchitis). The mapping is a direct match.

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.