E21.1
ICD-10BillableSecondary hyperparathyroidism, not elsewhere classified
Official ICD-10-CM descriptor (FY2026)
Secondary hyperparathyroidism, not elsewhere classified
E21.1 is valid for submission on a claim — CMS flags it as a billable, specific code.
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- secondary hyperparathyroidism of renal origin (N25.81)
Related codes in E21
Where this code sits
- Parent code
- E21
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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.