Specific code 2014 ICD-9-CM Diagnosis Code 518.1
Interstitial emphysema
  • Billable Code
  • ICD-9-CM 518.1 will be replaced by an equivalent ICD-10-CM code (or codes) when the United States transitions from ICD-9-CM to ICD-10-CM on October 1, 2015.
  • ICD-9-CM 518.1 is a billable medical code that can be used to specify a diagnosis on a reimbursement claim.
Disease Synonyms
  • Interstitial emphysema of lung
  • Mediastinal emphysema
  • Pneumomediastinum
Clinical Information
  • Pathologic accumulation of air in the interstitium of the lungs. It is caused by the rupture of alveoli and terminal bronchioles. It is most often seen in premature infants that need mechanical ventilation for respiratory distress syndrome.
518.1 Excludes
  • surgical (subcutaneous) emphysema (998.81)
  • that in fetus or newborn (770.2)
  • traumatic emphysema (958.7)
Applies To
  • Mediastinal emphysema
Convert to ICD-10-CM: 518.1 converts directly to:
  • 2014 ICD-10-CM J98.2 Interstitial emphysema
ICD-9-CM Volume 2 Index entries containing back-references to 518.1:
  • Air
    • anterior mediastinum 518.1
  • Disease, diseased - see also Syndrome
    • Hamman's (spontaneous mediastinal emphysema) 518.1
  • Emphysema (atrophic) (centriacinar) (centrilobular) (chronic) (diffuse) (essential) (hypertrophic) (interlobular) (lung) (obstructive) (panlobular) (paracicatricial) (paracinar) (postural) (pulmonary) (senile) (subpleural) (traction) (unilateral) (unilobular) (vesicular) 492.8
    • interstitial 518.1
    • mediastinal 518.1
  • Hamman's disease or syndrome (spontaneous mediastinal emphysema) 518.1
  • Pneumomediastinum 518.1
  • Syndrome - see also Disease
    • Hamman's (spontaneous mediastinal emphysema) 518.1
ICD-9-CM codes are used in medical billing and coding to describe diseases, injuries, symptoms and conditions. ICD-9-CM 518.1 is one of thousands of ICD-9-CM codes used in healthcare. Although ICD-9-CM and CPT codes are largely numeric, they differ in that CPT codes describe medical procedures and services. Can't find a code? Start at the root of ICD-9-CM, check the 2014 ICD-9-CM Index or use the search engine at the top of this page to lookup any code.