2024 ICD-10-CM Diagnosis Code J93.9

Pneumothorax, unspecified

ICD-10-CM Code:
Short Description:
Pneumothorax, unspecified
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Diseases of the respiratory system
    • Other diseases of the pleura
      • Pneumothorax and air leak

J93.9 is a billable diagnosis code used to specify a medical diagnosis of pneumothorax, unspecified. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Unspecified diagnosis codes like J93.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Clicking pneumothorax
  • Closed pneumothorax
  • Left pneumothorax
  • Pneumothorax
  • Right pneumothorax

Clinical Classification

Clinical Category:
CCSR Category Code:
Inpatient Default CCSR:
Y - Yes, default inpatient assignment for principal diagnosis or first-listed diagnosis.
Outpatient Default CCSR:
Y - Yes, default outpatient assignment for principal diagnosis or first-listed diagnosis.

Clinical Information

  • Pneumothorax - an accumulation of air or gas in the pleural cavity, which may occur spontaneously or as a result of trauma or a pathological process. the gas may also be introduced deliberately during pneumothorax, artificial.
  • Pneumothorax, Artificial - injection of air or a more slowly absorbed gas such as nitrogen, into the pleural cavity to collapse the lung.
  • Pleural Cavity - paired but separate cavity within the thoracic cavity. it consists of the space between the parietal and visceral pleura and normally contains a capillary layer of serous fluid that lubricates the pleural surfaces.
  • Grade 1 Neonatal Pneumothorax, AE|Grade 1 Neonatal Pneumothorax|Grade 1 Neonatal Pneumothorax, Adverse Event - an adverse event in a newborn characterized by radiological evidence of pneumothorax; no clinical signs; no care change required.
  • Grade 1 Pneumothorax, CTCAE|Grade 1 Pneumothorax|Grade 1 Pneumothorax - asymptomatic; clinical or diagnostic observations only; intervention not indicated
  • Grade 2 Neonatal Pneumothorax, AE|Grade 2 Neonatal Pneumothorax|Grade 2 Neonatal Pneumothorax, Adverse Event - an adverse event in a newborn characterized by radiological evidence of pneumothorax; minor clinical signs; minor care change required (e.g. oxygen, increased monitoring).
  • Grade 2 Pneumothorax, CTCAE|Grade 2 Pneumothorax|Grade 2 Pneumothorax - symptomatic; intervention indicated
  • Grade 3 Neonatal Pneumothorax, AE|Grade 3 Neonatal Pneumothorax|Grade 3 Neonatal Pneumothorax, Adverse Event - an adverse event in a newborn characterized by radiological evidence of pneumothorax; with clinical signs; major care change required (e.g. chest drainage).
  • Grade 3 Pneumothorax, CTCAE|Grade 3 Pneumothorax|Grade 3 Pneumothorax - sclerosis and/or operative intervention indicated; hospitalization indicated
  • Grade 4 Neonatal Pneumothorax, AE|Grade 4 Neonatal Pneumothorax|Grade 4 Neonatal Pneumothorax, Adverse Event - a pneumothorax adverse event in a newborn characterized by life-threatening respiratory and/or hemodynamic compromise (e.g. tension pneumothorax); urgent major care change required.
  • Grade 4 Pneumothorax, CTCAE|Grade 4 Pneumothorax|Grade 4 Pneumothorax - life-threatening consequences; urgent intervention indicated
  • Grade 5 Neonatal Pneumothorax, AE|Grade 5 Neonatal Pneumothorax|Grade 5 Neonatal Pneumothorax, Adverse Event - a pneumothorax adverse event in a newborn which results in death.
  • Grade 5 Pneumothorax, CTCAE|Grade 5 Pneumothorax|Grade 5 Pneumothorax - death
  • Neonatal Pneumothorax, AE|Neonatal Pneumothorax|Neonatal Pneumothorax, Adverse Event|Neonatal pneumothorax - an adverse event in a newborn characterized by a collection of air or other gas between the visceral and parietal pleura.
  • Pneumothorax - abnormal presence of air in the pleural cavity.
  • Pneumothorax, CTCAE|Pneumothorax|Pneumothorax|Pneumothorax - a disorder characterized by abnormal presence of air in the pleural cavity resulting in the collapse of the lung.

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Pneumothorax NOS

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert J93.9 to ICD-9-CM

  • ICD-9-CM Code: 512.89 - Other pneumothorax
    Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Patient Education

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. The fluid helps the two layers of the pleura glide smoothly past each other as your lungs breathe air in and out.

Disorders of the pleura include:

  • Pleurisy - inflammation of the pleura that causes sharp pain with breathing
  • Pleural effusion - excess fluid in the pleural space
  • Pneumothorax - buildup of air or gas in the pleural space
  • Hemothorax - buildup of blood in the pleural space

Many different conditions can cause pleural problems. Viral infection is the most common cause of pleurisy. The most common cause of pleural effusion is congestive heart failure. Lung diseases, like COPD, tuberculosis, and acute lung injury, cause pneumothorax. Injury to the chest is the most common cause of hemothorax. Treatment focuses on removing fluid, air, or blood from the pleural space, relieving symptoms, and treating the underlying condition.

NIH: National Heart, Lung, and Blood Institute

[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.


[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.