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2. ICD-10 Codes
3. Chapter - E00-E89
4. Section - E20-E35
5. Category - E21
6. E21.1

E21.1 - Secondary hyperparathyroidism, not elsewhere classified

• Applicable to Secondary hyperparathyroidism, not elsewhere classified
• The 2025 edition of ICD10-CM E21.1 became effective on October 1, 2024.
• This is the American ICD10-CM version of E21.1 - other international versions of ICD10 E21.1 may differ.
• E21.1 is a Billable / Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

Type 1 Excludes

• secondary hyperparathyroidism of renal origin (N25.81)

The following codes above E21.1 contain annotation back-references that may be applicable to E21.1:

• Chapter: E00-E89 - Endocrine, nutritional and metabolic diseases
• Section: E20-E35 - Disorders of other endocrine glands
• Category: E21 - Hyperparathyroidism and other disorders of parathyroid gland

Browse other similar CM codes:

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.