E20.819

HCC Category Mapping

What This Code Means

This condition occurs when the parathyroid glands don't produce enough parathyroid hormone, leading to low calcium levels in the blood. The specific cause of the hormone deficiency is not identified or specified.

Coding Tips

• •Use this code only when the documentation indicates impaired parathyroid hormone secretion but does not specify the underlying cause; if a specific etiology is documented (such as surgical removal, autoimmune, or genetic), use a more specific E20.8x code
• •Verify that laboratory findings (low calcium, high phosphate, elevated PTH levels) are documented to support the hypoparathyroidism diagnosis before coding

Clinical Significance

E20.819 identifies hypoparathyroidism due to impaired parathyroid hormone secretion, unspecified. This code is used when the provider documents hypoparathyroidism related to decreased parathyroid hormone production but does not specify whether the cause is idiopathic, autoimmune, genetic, or secondary. It reflects a documentation gap that should prompt further investigation or query.

Documentation Requirements

• ✓Documentation must confirm the hypoparathyroidism diagnosis with laboratory evidence of low parathyroid hormone and hypocalcemia.
• ✓The provider should be queried to specify the etiology when possible, as more specific codes (E20.0, E20.810-E20.812) provide better clinical documentation.

Commonly Confused Codes