The Vitamin D, 1, 25-dihydroxy test, may be used to help diagnose or monitor parathyroid hormone disorders. The Vitamin D, 1, 25-dihydroxy test may also be used to determine early kidney failure or other diseases which produce excess amounts of Vitamin D such as sarcoidosis or lymphomas. Turnaround time for the Vitamin D, 1, 25-dihydroxy is typically 2-3 business days.
The Vitamin D, 1, 25-dihydroxy test requires no isotopes be administered 24 hours prior to blood collection. Isotopes may be found in certain medications which may cause the testing to be rejected. Please contact the physician who is ordering your prescription to learn whether the medication you are taking may interfere with this testing.