2 doctors weighed in:
What else could cause elevated pth but normal calcium other than parathyroid?
2 doctors weighed in

Dr. Susan Wingo
Internal Medicine - Endocrinology
In brief: Low Vitamin D
Low vitamin d can cause secondary hyperparathyroidism (high PTH level due to something outside of the parathyroid gland).
Low vitamin d levels can make someone's calcium lower than it should be (even if it's still in the normal range). The parathyroid glands make more PTH to try to get the calcium back up where it should be.

In brief: Low Vitamin D
Low vitamin d can cause secondary hyperparathyroidism (high PTH level due to something outside of the parathyroid gland).
Low vitamin d levels can make someone's calcium lower than it should be (even if it's still in the normal range). The parathyroid glands make more PTH to try to get the calcium back up where it should be.
Dr. Susan Wingo
Dr. Susan Wingo
Thank
1 comment
Dr. Bradford Mitchell
Bisphosphonates (medicine to treat osteoporosis like fosamax) can do the same, cause relatively low calcium and normal parathyroid response to try to bring calcium back up.
Dr. Susan Wingo
Internal Medicine - Endocrinology
In brief: Kidney Failure
When kidneys are not working well, phosphorus levels go up, and calcium levels go down. These lower calcium level stimulate the parathyroids to make more pth. Again, even if the calcium levels are in the normal range, they may be low for that person, and cause the PTH to go up.

In brief: Kidney Failure
When kidneys are not working well, phosphorus levels go up, and calcium levels go down. These lower calcium level stimulate the parathyroids to make more pth. Again, even if the calcium levels are in the normal range, they may be low for that person, and cause the PTH to go up.
Dr. Susan Wingo
Dr. Susan Wingo
Thank
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