2026 ICD-10-CM Diagnosis Code J64Unspecified pneumoconiosis

ICD-10-CM Codes›J00–J99›J60-J70›J64

ICD-10-CM J64
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

J64 is a billable ICD-10-CM diagnosis code for unspecified pneumoconiosis. 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 benign pneumoconiosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Lung disease due to external agents.

Code Identity

ICD-10-CM Code
J64
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified pneumoconiosis
Chapter
J60-J70
Lung diseases due to external agents

Code Classification

ChapterJ00–J99Diseases of the respiratory system
SectionJ60-J70Lung diseases due to external agents
CategoryJ64Unspecified pneumoconiosis
This CodeJ64Unspecified pneumoconiosis

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Benign pneumoconiosis
  • Complicated pneumoconiosis
  • Mixed dust pneumoconiosis
  • Pneumoconiosis
  • Simple pneumoconiosis

Tabular List NotesGuidance

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

Type 1 Excludes

  • pneumonoconiosis with tuberculosis, any type in A15 J65

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.

    • Asthma, asthmatic(bronchial) (catarrh) (spasmodic)
      • pneumoconiotic NEC
    • Fibrosis, fibrotic
      • lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial)
        • with
          • dust reticulation
    • Fibrosis, fibrotic
      • lung (atrophic) (chronic) (confluent) (massive) (perialveolar) (peribronchial)
        • with
          • pneumoconiosis NOS
    • Pneumoconiosis(due to) (inhalation of)

Clinical ClassificationClinical

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

CCSR RSP013
Lung disease due to external agents
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Anthracosis

    a diffuse parenchymal lung disease caused by accumulation of inhaled carbon or coal dust. the disease can progress from asymptomatic anthracosis to massive lung fibrosis. this lung lesion usually occurs in coal miners, but can be seen in urban dwellers and tobacco smokers.

  • Pneumoconiosis

    a diffuse parenchymal lung disease caused by inhalation of dust and by tissue reaction to their presence. these inorganic, organic, particulate, or vaporized matters usually are inhaled by workers in their occupational environment, leading to the various forms (asbestosis; byssinosis; and others). similar air pollution can also have deleterious effects on the general population.

Patient EducationClinical

Interstitial Lung Diseases

Interstitial lung disease is the name for a large group of diseases that inflame or scar the lungs. The inflammation and scarring make it hard to get enough oxygen. The scarring is called pulmonary fibrosis.

Read the full article at MedlinePlus

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

Convert J64 to ICD-9-CMHistory

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

ICD-9-CM
505 Pneumoconiosis NOS
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 J64Overview

Is J64 (Unspecified pneumoconiosis) a billable code?

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

What MS-DRG does J64 group to?

When unspecified pneumoconiosis 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 J64?

Under the General Equivalence Mappings, unspecified pneumoconiosis converts to ICD-9-CM 505 (pneumoconiosis NOS). 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.