E21.1

Billable

Secondary hyperparathyroidism, not elsewhere classified

E21.1 is the ICD-10-CM code for Secondary hyperparathyroidism, not elsewhere classified. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
E00-E89
Parent
E21
Edition
FY2026

E00-E89 Endocrine, nutritional and metabolic diseases

Excludes1 — not coded here

  • secondary hyperparathyroidism of renal origin (N25.81)

Frequently asked questions

What is ICD-10 code E21.1?
E21.1 is the ICD-10-CM code for "Secondary hyperparathyroidism, not elsewhere classified". It falls under E00-E89 Endocrine, nutritional and metabolic diseases.
Is E21.1 a billable code?
Yes — E21.1 is a billable, specific ICD-10-CM code valid for reimbursement.
What is excluded from E21.1?
Excludes1 (not coded here): secondary hyperparathyroidism of renal origin (N25.81).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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