E84
ICD-10Non-billable categoryCystic fibrosis
Official ICD-10-CM descriptor (FY2026)
Cystic fibrosis
E84 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.
Includes
- mucoviscidosis
Code also
Two codes may be needed; sequencing depends on the reason for the encounter.
- exocrine pancreatic insufficiency (K86.81)
More specific codes under E84
Where this code sits
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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.