E21.1
E21.1: Secondary hyperparathyroidism, not elsewhere classified
Billable / specific codeICD-10-CM
E21.1 is a billable, specific ICD-10-CM code for secondary hyperparathyroidism, not elsewhere classified. It is valid for submission on a claim.
Check E21.1 with the rest of the claim: free scrubberExcludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- secondary hyperparathyroidism of renal origin (N25.81)
Excludes1 inherited from the categories above E21.1
A category’s note binds every code beneath it.
Excludes2 inherited from the categories above E21.1
Not part of this code, but both may be coded when both are present.
Other codes that can never be billed with E21.1
Their own Excludes1 notes name this code, so the conflict is not listed above.
- N25.81Secondary hyperparathyroidism of renal origin
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Medicare coverage
E21.1 is named in 12 Medicare coverage policies: 12 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A56416Billing and Coding: Assays for Vitamins and Metabolic Function
- A56798Billing and Coding: Vitamin D Assay Testing
- A56841Billing and Coding: Vitamin D; 25 hydroxy, includes fraction(s), if performed
- A57122Billing and Coding: Parathormone (Parathyroid Hormone)
Alphabetic index entries that lead here
- Osteodystrophy›parathyroid, secondary
- Hyperparathyroidism›secondary›non-renal
Code history
Unchanged in every release from FY2024 to FY2027.