A member asked:

What are common causes of normal calcium serum levels with high ionized calcium levels?

A doctor has provided 1 answer

Albumin deficiency: Total calcium is attached to albumin, an important protein in the blood. Your serum calcium may be erroneously normal if your ionized calcium is significantly elevated, look at Albumin level and also repeat the calcium tests to make sure no mistake. May need to look at mg, phos, and intact pth.

Answered 6/24/2014

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