Why get tested?
To determine whether PTH levels are responding normally to changes in blood calcium levels; to distinguish the cause of calcium imbalances; to evaluate parathyroid function; during surgery for hyperparathyroidism, to confirm removal of the gland(s) causing the problem


When to get tested?
When blood calcium levels are higher or lower than normal, and when your doctor wants to determine how well your parathyroid gland is functioning.

Sample required?
A blood sample drawn from a vein in your arm.