When are parathyroid hormone (PTH) and vitamin D testing indicated in the evaluation for hypocalcemia?

Updated: Aug 08, 2019
  • Author: Manish Suneja, MD, FASN, FACP; Chief Editor: Vecihi Batuman, MD, FASN  more...
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The parathyroid hormone (PTH) level should be checked as early as possible. Vitamin D should be measured if deficiency is suspected. In patients with PTH deficiencies, alkaline phosphatase levels tend to be normal or slightly decreased, whereas these levels frequently are elevated in patients with osteomalacia and rickets. If the diagnosis of osteomalacia is suspected, a bone biopsy can determine the final diagnosis.

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