2026 ICD-10-CM Diagnosis Code J93.81Chronic pneumothorax

ICD-10-CM Codes›J00–J99›J90-J94›J93

ICD-10-CM J93.81
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

J93.81 is a billable ICD-10-CM diagnosis code for chronic pneumothorax. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 199 through 201. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Pneumothorax.

Code Identity

ICD-10-CM Code
J93.81
Billable Status
Yes — Valid for Submission
Code Describes
Chronic pneumothorax
Short Description
Chronic pneumothorax
Same as the full description in the CMS dataset.
Parent Code
J93.8
Other pneumothorax and air leak

Code Classification

ChapterJ00–J99Diseases of the respiratory system
SectionJ90-J94Other diseases of the pleura
CategoryJ93Pneumothorax and air leak
This CodeJ93.81Chronic pneumothorax

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Chronic pneumothorax

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.

    • Pneumothorax NOS
      • chronic

Clinical ClassificationClinical

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

CCSR RSP014
Pneumothorax
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Pleural Disorders

Your pleura is a large, thin sheet of tissue that wraps around the outside of your lungs and lines the inside of your chest cavity. Between the layers of the pleura is a very thin space. Normally it's filled with a small amount of fluid.

Read the full article at MedlinePlus

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

Convert J93.81 to ICD-9-CMHistory

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

ICD-9-CM
512.83 Chronic pneumothorax
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 J93.81Overview

Is J93.81 (Other pneumothorax and air leak) a billable code?

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

What MS-DRG does J93.81 group to?

When chronic pneumothorax is the principal diagnosis on an inpatient stay, it groups to MS-DRG 199, 200, 201, with relative weights from 0.7151 to 1.7641 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of J93.81?

Under the General Equivalence Mappings, chronic pneumothorax converts to ICD-9-CM 512.83 (chronic pneumothorax). 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.