ICD-10-CM 2027
ICD-10 code for mediastinal emphysema
From the official ICD-10-CM alphabetic index entry “Emphysema (atrophic) (bullous) (chronic) (interlobular) (lung) (obstructive) (pulmonary) (senile) (vesicular) › mediastinal”. Page updated September 29, 2026.
About coding mediastinal emphysema
The ICD-10-CM code for mediastinal emphysema is J98.2 (Interstitial emphysema). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on J98.2.
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.
More specific mediastinal emphysema codes (official index)
- newborn P25.2 — Pneumomediastinum originating in the perinatal period
Don't confuse with (Excludes1 for J98.2)
Common questions about mediastinal emphysema ICD-10 codes
What is the ICD-10 code for mediastinal emphysema?
- J98.2 — Interstitial emphysema. More specific codes apply when the documentation supports them: P25.2.
What is the ICD-10 code for newborn mediastinal emphysema?
- P25.2 — Pneumomediastinum originating in the perinatal period.
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.