What is the ICD-10-CM code for hyperparathyroidism?

The primary ICD-10-CM code for hyperparathyroidism is N25.81 (Secondary hyperparathyroidism of renal origin). There are 11 billable hyperparathyroidism codes in FY2027, covering different types and underlying causes.

How many ICD-10-CM codes are there for hyperparathyroidism?

There are 12 ICD-10-CM codes for hyperparathyroidism in the FY2027 tabular list, of which 11 are billable. These codes fall under Chapter 4 of the ICD-10-CM classification.

Which chapter covers hyperparathyroidism in ICD-10-CM?

Hyperparathyroidism codes are classified in Chapter 4 of the ICD-10-CM tabular list: E00–E89 (Endocrine, Nutritional and Metabolic Diseases).

Hyperparathyroidism ICD-10-CM codes

ICD-10-CM codes for primary, secondary, and tertiary hyperparathyroidism, including secondary hyperparathyroidism of renal origin in chronic kidney disease.

12 codes, 11 billable. FY2027, valid from October 1, 2026. In chapter 4: Endocrine, Nutritional and Metabolic Diseases.

How to code Hyperparathyroidism

Primary hyperparathyroidism is E21.0. Secondary hyperparathyroidism is split by cause: N25.81 when it is of renal origin (due to chronic kidney disease), and E21.1 for other causes such as vitamin D deficiency or malabsorption. E21.1 has an Excludes1 note for the renal form, so the two are never reported together.

With N25.81, also code the stage of chronic kidney disease (N18.-), and Z99.2 when the patient is on dialysis. Tertiary hyperparathyroidism is E21.2 and E21.3 is unspecified. Hypercalcemia from primary hyperparathyroidism can be reported with E83.52 when the provider documents it.

All Hyperparathyroidism codes

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