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E20.811

Billable

Secondary hypoparathyroidism in diseases classified elsewhere

HCC Category Mapping

V24HCC 23Other Significant Endocrine and Metabolic Disorders
0.230
ESRDHCC 23Other Significant Endocrine and Metabolic Disorders
0.000
RxHCCHCC 43Other Significant Endocrine and Metabolic Disorders
0.000

What This Code Means

Low parathyroid hormone production that develops as a result of another disease or medical condition classified elsewhere in the ICD-10 system.

Coding Tips

  • Always use an additional code to identify the underlying disease causing the secondary hypoparathyroidism
  • Review the patient's other diagnoses to determine the primary condition responsible for the parathyroid dysfunction

Clinical Significance

E20.811 identifies secondary hypoparathyroidism in diseases classified elsewhere, most commonly occurring after thyroidectomy, parathyroidectomy, or radiation therapy to the neck. It can also occur secondary to infiltrative diseases (hemochromatosis, Wilson disease) or magnesium depletion. This is the most common form of hypoparathyroidism encountered in clinical practice.

Documentation Requirements

  • Documentation must include the hypoparathyroidism diagnosis, the underlying cause or associated disease, and supporting laboratory evidence.
  • The primary condition causing the secondary hypoparathyroidism must be coded first, with E20.811 as an additional code.
  • Calcium levels, parathyroid hormone levels, and current replacement therapy should be documented.

Code First

  • underlying condition, if known

Commonly Confused Codes

Code Hierarchy

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