ICD-10-CM 2027
ICD-10 code for anterior mediastinum air
From the official ICD-10-CM alphabetic index entry “Air › anterior mediastinum”. Page updated September 29, 2026.
About coding anterior mediastinum air
The ICD-10-CM code for anterior mediastinum air is J98.2 (Interstitial emphysema).
Within J98 (other respiratory disorders), J98.2 is specifically for interstitial emphysema. Related codes cover diseases of bronchus, not elsewhere classified (J98.0), pulmonary collapse (J98.1), Compensatory emphysema (J98.3), other disorders of lung (J98.4), diseases of mediastinum, not elsewhere classified (J98.5), disorders of diaphragm (J98.6), other specified respiratory disorders (J98.8) and respiratory disorder, unspecified (J98.9).
Don't report J98.2 together with the conditions in its Excludes1 note: emphysema NOS (J43.9), emphysema in newborn (P25.0), surgical emphysema (subcutaneous) (T81.82) and traumatic subcutaneous emphysema (T79.7).
Use an additional code to identify: exposure to environmental tobacco smoke (Z77.22), exposure to tobacco smoke in the perinatal period (P96.81), history of tobacco dependence (Z87.891), occupational exposure to environmental tobacco smoke (Z57.31), tobacco dependence (F17.-) and 1 more.
Don't confuse with (Excludes1 for J98.2)
Common questions about anterior mediastinum air ICD-10 codes
What is the ICD-10 code for anterior mediastinum air?
- J98.2 — Interstitial emphysema.
Is J98.2 billable?
- Yes. J98.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J98.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J98.2 as a principal diagnosis.
Is J98.2 a CC or MCC?
- No. J98.2 is neither a CC nor an MCC under MS-DRG v44.0.