E21.1
BillableSecondary 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.
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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