2026 ICD-10-CM Diagnosis Code J82.81Chronic eosinophilic pneumonia

ICD-10-CM Codes›J00–J99›J80-J84›J82

ICD-10-CM J82.81
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

J82.81 is a billable ICD-10-CM diagnosis code for chronic eosinophilic pneumonia. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 196 through 198. Coders also document this condition as cryptogenic pulmonary eosinophilia. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified lower respiratory disease.

Code Identity

ICD-10-CM Code
J82.81
Billable Status
Yes — Valid for Submission
Code Describes
Chronic eosinophilic pneumonia
Short Description
Chronic eosinophilic pneumonia
Same as the full description in the CMS dataset.
Parent Code
J82.8
Pulmonary eosinophilia, not elsewhere classified

Code Classification

ChapterJ00–J99Diseases of the respiratory system
SectionJ80-J84Other respiratory diseases principally affecting the interstitium
CategoryJ82Pulmonary eosinophilia, not elsewhere classified
This CodeJ82.81Chronic eosinophilic pneumonia

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cryptogenic pulmonary eosinophilia
  • Idiopathic chronic eosinophilic pneumonitis
  • Idiopathic eosinophilia
  • Idiopathic eosinophilic pneumonitis
  • Pulmonary eosinophilia
  • Pulmonary eosinophilic infiltration

Tabular List NotesGuidance

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

Inclusion Terms

  • Eosinophilic pneumonia, NOS

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.

    • Eosinophilia(allergic) (idiopathic) (secondary)
      • pulmonary NEC
        • chronic
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • eosinophilic
    • Pneumonia(acute) (double) (migratory) (purulent) (septic) (unresolved)
      • eosinophilic
        • chronic
    • Pneumonitis(acute) (primary)
      • eosinophilic
    • Pneumonitis(acute) (primary)
      • eosinophilic
        • chronic

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 Yes · outpatient Yes

Clinical InformationClinical

  • Pulmonary Eosinophilia

    a condition characterized by infiltration of the lung with eosinophils due to inflammation or other disease processes. major eosinophilic lung diseases are the eosinophilic pneumonias caused by infections, allergens, or toxic agents.

  • Eosinophils

    granular leukocytes with a nucleus that usually has two lobes connected by a slender thread of chromatin, and cytoplasm containing coarse, round granules that are uniform in size and stainable by eosin.

  • Chronic Eosinophilic Pneumonia

    chronic inflammatory disorder of the lungs characterized by the presence of eosinophils in the interalveolar septa and alveolar spaces and peripheral blood eosinophilia. chest x-rays reveal peripheral infiltrates. approximately half of the patients have history of asthma or atopic disease. signs and symptoms include fever, dyspnea, cough, and weight loss. following treatment with corticosteroids, the eosinophilic infiltrates in the lungs disappear, resulting in dramatic clinical improvement.

Patient EducationClinical

Eosinophilic Disorders

Eosinophils are a type of white blood cell. They help fight off infections and play a role in your body's immune response. They can also build up and cause inflammation.

Read the full article at MedlinePlus

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

Code History & ChangesHistory

Replacement J82.81 replaces the following previously assigned code(s):

  • J82 - Pulmonary eosinophilia, not elsewhere classified
FY 2021AddedAdded to the ICD-10-CM code setEffective October 1, 2020.
FY 2022–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About J82.81Overview

Is J82.81 (Pulmonary eosinophilia, not elsewhere classified) a billable code?

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

What MS-DRG does J82.81 group to?

When chronic eosinophilic pneumonia is the principal diagnosis on an inpatient stay, it groups to MS-DRG 196, 197, 198, with relative weights from 0.7162 to 1.8872 depending on complications. Higher weights mean higher Medicare reimbursement.

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.