J98.5
ICD-10Non-billable categoryDiseases of mediastinum, not elsewhere classified
Official ICD-10-CM descriptor (FY2026)
Diseases of mediastinum, not elsewhere classified
J98.5 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- abscess of mediastinum (J85.3)
ICD-10-CM FY2026 defines 2 codes beneath J98.5. See the ICD-10-CM index for what this site publishes.
Related codes in J98
Where this code sits
- Parent code
- J98
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.