Parathormone; Parathormone (PTH) intact molecule; Parathyroid hormone

Normal values are 10 - 55 picograms per milliliter (pg/mL). Normal value ranges may vary slightly among different laboratories. Talk to your doctor about the meaning of your specific test results.

Greater than normal levels may occur with:

• Chronic kidney failure
• Familial hypocalciuric hypercalcemia (FHH)
• High phosphate levels (hyperphosphatemia)
• Hyperparathyroidism
• Increased blood lipids
• Malabsorption syndrome
• Osteomalacia in adults
• Pregnancy or breastfeeding
• Pseudohypoparathyroidism
• Rickets in children
• Use of certain medications such as rifampin, anticonvulsants, diuretics, lithium, and those containing phosphate
• Vitamin D deficiency

Lower than normal levels may occur with:

• Accidental removal of parathyroid glands during neck surgery
• Autoimmune destruction of parathyroid gland
• Hypomagnesemia
• Hypoparathyroidism
• Metastatic bone tumor
• Milk-alkali syndrome (taking too much calcium)
• Radiation to the parathyroid glands
• Sarcoidosis
• Vitamin D intoxication

Other conditions under which the test may be performed:

• Multiple endocrine neoplasia (MEN) II
• Multiple endocrine neoplasia (MEN) I
• Secondary hyperparathyroidism

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PTH Overview

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PTH Risks

Review Date: 10/14/2009
Reviewed By: Ari S. Eckman, MD, Division of Endocrinology and Metabolism, Johns Hopkins School of Medicine, Baltimore, MD. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org)