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2007 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Respiratory System 460-519 > Other Diseases Of Respiratory System 510-519 > Other Diseases Of Lung 518.* > 2007 ICD-9-CM Diagnosis 518.1 Interstitial emphysema  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 518.1 can be accessed here. Presence of air in the mediastinal tissues due to leakage of air from the tracheobronchial tree, usually as a result of trauma. 518.1 is a specific code that can be used to specify a diagnosis 518.1 contains 8 index entries View the ICD-9-CM Volume 1 518.* hierarchy 518.1 also known as: Mediastinal emphysema 518.1 excludes: surgical (subcutaneous) emphysema (998.81) that in fetus or newborn (770.2) traumatic emphysema (958.7) Index entries containing 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 congenital 770.2 fetus or newborn 770.2 mediastinal 518.1 fetus or newborn 770.2 subcutaneous 958.7 nontraumatic 518.1 Hamman's disease or syndrome (spontaneous mediastinal emphysema) 518.1 Pneumomediastinum 518.1 congenital 770.2 fetus or newborn 770.2 Syndrome - see also Disease Hamman's (spontaneous mediastinal emphysema) 518.1