What ICD-10 codes are used for parathyroidectomy?
Parathyroidectomy is performed to treat conditions like primary hyperparathyroidism, secondary hyperparathyroidism, and parathyroid hyperplasia, all of which involve overproduction of parathyroid hormone by one or more of the four parathyroid glands. This overactivity can result in high blood calcium levels, kidney stones, and other metabolic complications.
In most cases, the goal is to remove the overactive gland while preserving the remaining parathyroid glands to keep calcium levels within a healthy range. Care is taken to avoid damaging the nearby thyroid gland, and long-term follow-up may be needed to monitor for recurrence or too much parathyroid hormone production. Parathyroidectomy remains the most definitive way to treat primary hyperparathyroidism when medical management is ineffective.
ICD-10-CM codes help document these conditions before or after parathyroid surgery, including cases treated with minimally invasive surgery or bilateral neck exploration.
These are the ICD codes used for Parathyroidectomy:
E21.0 – Primary hyperparathyroidism
Used when a single or multiple overactive parathyroid glands cause excess parathyroid hormone, often requiring parathyroidectomy.
E21.1 – Secondary hyperparathyroidism, NEC
Refers to parathyroid overactivity due to another medical condition (e.g., chronic kidney disease), not a gland disorder itself.
E21.2 – Other hyperparathyroidism
Covers rare cases like tertiary or refractory hyperparathyroidism, often requiring bilateral exploration.
E21.3 – Hyperparathyroidism, unspecified
Used when the type of hyperparathyroidism is not clearly defined in the documentation.
E21.4 – Other specified disorders of parathyroid gland
Applied to uncommon or complex parathyroid disorders not classified elsewhere.
E21.5 – Disorder of parathyroid gland, unspecified
A general code for unspecified parathyroid gland issues; may be used preoperatively.
D35.1 – Benign neoplasm of parathyroid gland
Used when an adenoma is the cause of overactive parathyroid hormone production.
E89.2 – Postprocedural hypoparathyroidism
This is for patients who develop low calcium or hypocalcemia after parathyroidectomy.
E89.89 – Other postprocedural endocrine complications
Captures additional endocrine/metabolic complications after parathyroid surgery.