2026 ICD-10-CM Diagnosis Code J94.2Hemothorax

ICD-10-CM Codes›J00–J99›J90-J94›J94

ICD-10-CM J94.2
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

J94.2 is a billable ICD-10-CM diagnosis code for hemothorax. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 186 through 188. Coders also document this condition as clotted hemothorax. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Pleurisy, pleural effusion and pulmonary collapse.

Code Identity

ICD-10-CM Code
J94.2
Billable Status
Yes — Valid for Submission
Code Describes
Hemothorax
Short Description
Hemothorax
Same as the full description in the CMS dataset.
Parent Code
J94
Other pleural conditions

Code Classification

ChapterJ00–J99Diseases of the respiratory system
SectionJ90-J94Other diseases of the pleura
CategoryJ94Other pleural conditions
This CodeJ94.2Hemothorax

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Clotted hemothorax
  • Hemopneumothorax
  • Hemothorax
  • Nontraumatic hemothorax

Tabular List NotesGuidance

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

Inclusion Terms

  • Hemopneumothorax

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.

    • Hemothorax(bacterial) (nontuberculous)
    • Pneumohemothorax

Clinical ClassificationClinical

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

CCSR RSP011
Pleurisy, pleural effusion and pulmonary collapse
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Hemothorax

    hemorrhage within the pleural cavity.

  • Hemopneumothorax

    collection of air and blood in the pleural cavity.

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 J94.2 to ICD-9-CMHistory

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

ICD-9-CM
511.1 Bact pleur/effus not TB
Approximate The match is approximate rather than exact.
ICD-9-CM
511.89 Effusion NEC exc tb
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 J94.2Overview

Is J94.2 (Other pleural conditions) a billable code?

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

What MS-DRG does J94.2 group to?

When hemothorax is the principal diagnosis on an inpatient stay, it groups to MS-DRG 186, 187, 188, with relative weights from 0.7172 to 1.5585 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of J94.2?

Under the General Equivalence Mappings, hemothorax converts to ICD-9-CM 511.1 (bact pleur/effus not TB) and 511.89 (effusion NEC exc tb). The mapping is approximate, so confirm the match fits the documentation.

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.