2026 ICD-10-CM Diagnosis Code J84.10Pulmonary fibrosis, unspecified

ICD-10-CM Codes›J00–J99›J80-J84›J84

ICD-10-CM J84.10
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

J84.10 is a billable ICD-10-CM diagnosis code for pulmonary fibrosis, unspecified. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified lower respiratory disease.

Code Identity

ICD-10-CM Code
J84.10
Billable Status
Yes — Valid for Submission
Code Describes
Pulmonary fibrosis, unspecified
Short Description
Pulmonary fibrosis, unspecified
Same as the full description in the CMS dataset.
Parent Code
J84.1
Other interstitial pulmonary diseases with fibrosis

Code Classification

ChapterJ00–J99Diseases of the respiratory system
SectionJ80-J84Other respiratory diseases principally affecting the interstitium
CategoryJ84Other interstitial pulmonary diseases
This CodeJ84.10Pulmonary fibrosis, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Atrophic fibrosis of lung
  • Calcified granuloma of lung
  • Chronic fibrosing pulmonary aspergillosis
  • Chronic fibrosis of lung
  • Chronic induration of lung
  • Chronic pulmonary aspergillosis
  • Chronic pulmonary fibrosis caused by vapor
  • Chronic respiratory condition caused by vapor
  • Confluent fibrosis of lung
  • Congenital anomaly of endocrine ovary
  • Diffuse interstitial pulmonary fibrosis
  • Drug induced pulmonary fibrosis
  • Drug-induced interstitial lung disorder
  • Fibrosis of lung
  • Fibrosis, neurodegeneration, cerebral angiomatosis syndrome
  • Hereditary fibrosing poikiloderma, tendon contractures, myopathy, pulmonary fibrosis syndrome
  • Hereditary sclerosing poikiloderma
  • Induration of lung
  • Interstitial pulmonary fibrosis due to inhalation of drug
  • Interstitial pulmonary fibrosis due to inhalation of substance
  • Localized pulmonary fibrosis
  • Lung fibrosis, immunodeficiency, 46,XX gonadal dysgenesis syndrome
  • Massive fibrosis of lung
  • Multiple hyalinizing granuloma of lung
  • Multiple nodules of lung
  • Nodular hyperplasia of liver
  • Nodular regenerative hyperplasia of liver
  • Nodule of liver
  • Ovarian dysgenesis
  • Perialveolar fibrosis of lung
  • Peribronchial fibrosis of lung
  • PF-ILD-progressive fibrosing interstitial lung disease
  • Plasma cell granuloma of lung
  • Post-inflammatory pulmonary fibrosis
  • Pulmonary aspergillosis
  • Pulmonary emphysema co-occurrent with fibrosis of lung
  • Pulmonary fibrosis due to Hermansky-Pudlak syndrome
  • Pulmonary fibrosis due to paracoccidioidomycosis
  • Pulmonary fibrosis, hepatic hyperplasia, bone marrow hypoplasia syndrome
  • Pulmonary granuloma
  • Pulmonary hyalinizing granuloma
  • Pulmonary nodular lymphoid hyperplasia
  • Pure gonadal dysgenesis
  • Pure gonadal dysgenesis 46,XX
  • Respiratory condition caused by vapor
  • Single hyalinizing granuloma of lung
  • Solitary nodule of lung
  • Tendon contracture

Tabular List NotesGuidance

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

Inclusion Terms

  • Capillary fibrosis of lung
  • Cirrhosis of lung (chronic) NOS
  • Fibrosis of lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial) NOS
  • Induration of lung (chronic) NOS
  • Postinflammatory pulmonary fibrosis

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.

    • Block, blocked
      • alveolocapillary
    • Cirrhosis, cirrhotic(hepatic) (liver)
      • lung (chronic)
    • Cirrhosis, cirrhotic(hepatic) (liver)
      • pulmonary
    • Fibrosis, fibrotic
      • lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial)
    • Fibrosis, fibrotic
      • lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial)
        • capillary
    • Fibrosis, fibrotic
      • lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial)
        • diffuse (idiopathic)
    • Fibrosis, fibrotic
      • lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial)
        • diffuse (idiopathic)
          • chemicals, gases, fumes or vapors (inhalation)
    • Fibrosis, fibrotic
      • lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial)
        • diffuse (idiopathic)
          • interstitial
    • Fibrosis, fibrotic
      • lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial)
        • postinflammatory
    • Fibrosis, fibrotic
      • pulmonary
    • Induration, indurated
      • lung (black) (chronic) (fibroid)
    • Syndrome
      • alveolocapillary block

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

  • Asbestosis

    a form of pneumoconiosis caused by inhalation of asbestos fibers which elicit potent inflammatory responses in the parenchyma of the lung. the disease is characterized by interstitial fibrosis of the lung, varying from scattered sites to extensive scarring of the alveolar interstitium.

  • Idiopathic Pulmonary Fibrosis

    a common interstitial lung disease of unknown etiology, usually occurring between 50-70 years of age. clinically, it is characterized by an insidious onset of breathlessness with exertion and a nonproductive cough, leading to progressive dyspnea. pathological features show scant interstitial inflammation, patchy collagen fibrosis, prominent fibroblast proliferation foci, and microscopic honeycomb change.

  • Pulmonary Fibrosis

    a process in which normal lung tissues are progressively replaced by fibroblasts and collagen causing an irreversible loss of the ability to transfer oxygen into the bloodstream via pulmonary alveoli. patients show progressive dyspnea finally resulting in death.

  • Invasive Pulmonary Aspergillosis

    lung infections with the invasive forms of aspergillus, usually after surgery, transplantation, prolonged neutropenia or treatment with high-doses of corticosteroids. invasive pulmonary aspergillosis can progress to chronic necrotizing pulmonary aspergillosis or hematogenous spread to other organs.

  • Pulmonary Aspergillosis

    infections of the respiratory tract with fungi of the genus aspergillus.

  • Aspergillus

    a genus of mitosporic fungi containing about 100 species and eleven different teleomorphs in the family trichocomaceae.

  • Dyspnea

    difficult or labored breathing.

  • Localized Pulmonary Fibrosis

    replacement of the lung tissue by connective tissue in a specific area of the lung.

  • Chronic Pulmonary Aspergillosis

    a spectrum of disorders associated with long-term aspergillus infection of the lung that usually occur in immunocompetent individuals with underlying respiratory disorders, and may be characterized by pulmonary fibrosis or cavitation.

Patient EducationClinical

Pulmonary Fibrosis

Pulmonary fibrosis is a condition in which the tissue deep in your lungs becomes scarred over time. This tissue gets thick and stiff. That makes it hard for you to catch your breath, and your blood may not get enough oxygen.

Read the full article at MedlinePlus

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

Convert J84.10 to ICD-9-CMHistory

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

ICD-9-CM
515 Postinflam pulm fibrosis
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 J84.10Overview

Is J84.10 (Other interstitial pulmonary diseases with fibrosis) a billable code?

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

What MS-DRG does J84.10 group to?

When pulmonary fibrosis, unspecified 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.

What is the ICD-9 equivalent of J84.10?

Under the General Equivalence Mappings, pulmonary fibrosis, unspecified converts to ICD-9-CM 515 (postinflam pulm fibrosis). 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.