Convert ICD-10 Code E21.0 to ICD-9

Source ICD-10 Code		Target ICD-9 Code
E21.0 Primary hyperparathyroidism		252.01 Primary hyperparathyroid

ICD-10 to ICD-9 crosswalk for code E21.0 - primary hyperparathyroidism based on the most recent General Equivalence Mappings (GEMS) information.