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Calcium, Ionized Serum Test

Calcium Free, Calcium Unbound, Calcium Filterable, Ca++ Ionized
Sample Report
Specimen Type: Blood


Calcium, Ionized Serum Test

The Calcium, Ionized test may be used to measure the free or unbound amount of calcium in the blood.  Calcium is a mineral which is important for healthy functioning of the heart, muscles and nervous system as well as proper bone formation.  Calcium which is not bound to albumin is considered free and metabolically active. 

In most cases, a total calcium blood test is an accurate way to measure calcium because there is a stable balance between free and bound calcium.  However, in some cases the balance between free and bound calcium is disrupted which will make measuring free calcium more effective.  This can include when a person has abnormally low albumin levels, is undergoing major surgery, is receiving blood transfusions or is critically ill.

This test is typically ordered when a person has a condition which may make a regular calcium blood test inaccurate.  Some people with low ionized calcium levels may experience symptoms such as muscle spasms or numbness around the mouth or in the hands and feet.

Turnaround time for the Calcium, Ionized test is typically 1-2 business days.

Note: Result turn around times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.


The Calcium, Ionized test has no fasting requirements.



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for the month of 



Take 14% off all testing.

Use coupon code ANNIV14 during checkout.

Offer expires December 14, 2016.


Cannot be applied to industry discounted prices, previous orders or tests not listed on our website. One coupon code per order. Coupon code expires at Midnight EST.