E21
Non-billableHyperparathyroidism and other disorders of parathyroid gland
E21 is the ICD-10-CM code for Hyperparathyroidism and other disorders of parathyroid gland. It is a non-billable category code — use a more specific child code such as E21.0 for billing.
- Status
- Header (non-billable)
- Chapter
- E00-E89
- Subcodes
- 6
- Edition
- FY2026
E00-E89 Endocrine, nutritional and metabolic diseases
What this means — in plain language
MedlinePlus · NIHMost people have four pea-sized glands, called parathyroid glands, on the thyroid gland in the neck. Though their names are similar, the thyroid and parathyroid glands are completely different. The parathyroid glands make parathyroid hormone (PTH), which helps your body keep the right balance of calcium and phosphorous. If your parathyroid glands make too much or too little hormone, it disrupts this balance. If they…
Read more about Parathyroid Disorders at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Excludes1 — not coded here
Excludes2 — not included here
- •familial hypocalciuric hypercalcemia (E83.52)
Medications indicated for this condition
FDA labelingDrugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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