Intact PTH is the most frequently ordered parathyroid hormone test and is used to diagnose the cause of a low or high calcium level and also helps in distinguishing between parathyroid-related and non-parathyroid-related causes. PTH helps people in monitoring with chronic kidney disease or those who are already on dialysis. Along with the PTH, a calcium test is always recommended as it’s not just the level in the blood that is important but also the balance between the calcium and PTH and the response of the parathyroid glands to changing levels of calcium. PTH levels can be further used to monitor people who have conditions or diseases that cause chronic calcium imbalances or to monitor those who had surgery or another treatment for a parathyroid tumor.