ICD-10-CM 2027
ICD-10 code for mediastinum herniation
Other diseases of mediastinum, not elsewhere classified
From the official ICD-10-CM alphabetic index entry “Herniation › mediastinum”. Page updated September 29, 2026.
About coding mediastinum herniation
The ICD-10-CM code for mediastinum herniation is J98.59 (Other diseases of mediastinum, not elsewhere classified).
Within J98.5, choose J98.59 (Other diseases of mediastinum, not elsewhere classified) only when documentation doesn't support a more specific option: Mediastinitis (J98.51).
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.
As a secondary diagnosis it is an MCC (major complication or comorbidity), which can move an inpatient stay into the highest-paying "with MCC" MS-DRG of its family, unless the principal diagnosis excludes it.
Common questions about mediastinum herniation ICD-10 codes
What is the ICD-10 code for mediastinum herniation?
- J98.59 — Other diseases of mediastinum, not elsewhere classified.
Is J98.59 billable?
- Yes. J98.59 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J98.59 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J98.59 as a principal diagnosis.
Is J98.59 a CC or MCC?
- J98.59 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.