E21.3

HCC Category Mapping

What This Code Means

Elevated parathyroid hormone and calcium levels when the specific cause or type of hyperparathyroidism has not been determined or documented.

Coding Tips

• •This is a default code used when hyperparathyroidism is diagnosed but insufficient information exists to specify the type
• •Query the provider for additional documentation to assign a more specific code (E21.0, E21.1, or E21.2)

Clinical Significance

Unspecified hyperparathyroidism indicates elevated parathyroid hormone activity without sufficient clinical documentation to categorize it as primary, secondary, or tertiary. This lack of specificity limits clinical management decisions and should prompt provider query for clarification.

Documentation Requirements

• ✓Attempt to determine whether the hyperparathyroidism is primary, secondary, or tertiary by reviewing lab results, imaging, and clinical history.
• ✓Document parathyroid hormone levels, calcium levels, and any identified underlying etiology.

Commonly Confused Codes