E21
E21: Hyperparathyroidism and other disorders of parathyroid gland
Non-billable headerICD-10-CM
E21 is a non-billable header ICD-10-CM code for hyperparathyroidism and other disorders of parathyroid gland. It cannot be billed on its own: choose one of the more specific child codes below.
Excludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
Excludes2: not included here, but may coexist
The excluded condition is not part of this code, but a patient can have both. You may code both.
- familial hypocalciuric hypercalcemia (E83.52)
Other codes that can never be billed with E21
Their own Excludes1 notes name this code, so the conflict is not listed above.
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead E21
6 child codes. Green means billable.