2026 ICD-10-CM Diagnosis Code J93.11Primary spontaneous pneumothorax

ICD-10-CM Codes›J00–J99›J90-J94›J93

ICD-10-CM J93.11
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

J93.11 is a billable ICD-10-CM diagnosis code for primary spontaneous 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. Coders also document this condition as familial spontaneous pneumothorax. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Pneumothorax.

Code Identity

ICD-10-CM Code
J93.11
Billable Status
Yes — Valid for Submission
Code Describes
Primary spontaneous pneumothorax
Short Description
Primary spontaneous pneumothorax
Same as the full description in the CMS dataset.
Parent Code
J93.1
Other spontaneous pneumothorax

Code Classification

ChapterJ00–J99Diseases of the respiratory system
SectionJ90-J94Other diseases of the pleura
CategoryJ93Pneumothorax and air leak
This CodeJ93.11Primary spontaneous pneumothorax

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Familial spontaneous pneumothorax
  • Primary spontaneous pneumothorax
  • Spontaneous 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
      • spontaneous NOS
        • primary

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

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Convert J93.11 to ICD-9-CMHistory

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

ICD-9-CM
512.81 Prim spont 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 J93.11Overview

Is J93.11 (Other spontaneous pneumothorax) a billable code?

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

What MS-DRG does J93.11 group to?

When primary spontaneous 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 J93.11?

Under the General Equivalence Mappings, primary spontaneous pneumothorax converts to ICD-9-CM 512.81 (prim spont pneumothorax). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.