E21Non-billable
Hyperparathyroidism and other disorders of parathyroid gland
Chapter 4: Endocrine, nutritional and metabolic diseases
Excludes2
1 item
Excludes2
- •familial hypocalciuric hypercalcemia (E83.52)
Coding Guidance
E21 should not be used for reimbursement purposes as there are more specific codes below it that contain a greater level of detail. See Related Codes to drill down to more specific billable codes for appropriate reimbursement.
Additional Information from Parent Codes
The following information may apply to this code from its parent codes in the ICD-10 hierarchy. This information is important for proper coding and classification.
Parent Codes Referenced:
Excludes1
1 item
Excludes1
From E00-E89:
- •transitory endocrine and metabolic disorders specific to newborn (P70-P74)
Notes
1 item
Notes
From E00-E89:
- •All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.