Is E21 a billable code?
No. E21 is a header code that groups 6 more specific codes. Use one of the billable codes listed on this page instead.
ICD-10-CM FY2027 diagnosis code
E21: Hyperparathyroidism and other disorders of parathyroid gland
Header code: not billableValid for dates of service October 1, 2026 to September 30, 2027
E21 groups related diagnoses under hyperparathyroidism and other disorders of parathyroid gland. It cannot be used on a claim by itself. Choose the billable code below that matches the patient's record.
E21 questions
What does E21 mean?
E21 is the ICD-10-CM code for Hyperparathyroidism and other disorders of parathyroid gland. It is in chapter 4, Endocrine, nutritional and metabolic diseases (E00-E89).
Code titles come from the official ICD-10-CM files published by the CDC National Center for Health Statistics. Always check payer rules and the clinical record before billing.