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

E21.3 - Hyperparathyroidism, unspecified

• Applicable to Hyperparathyroidism, unspecified
• The 2025 edition of ICD10-CM E21.3 became effective on October 1, 2024.
• This is the American ICD10-CM version of E21.3 - other international versions of ICD10 E21.3 may differ.
• E21.3 is a Billable / Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

The following codes above E21.3 contain annotation back-references that may be applicable to E21.3:

• 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.