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Ionized Calcium Blood Test


* This is not a home test kit. You will need to visit a local lab for testing.


This test is used to evaluate unbound (ionized) calcium.

Calcium exists in serum in its ionized form or it is bound to organic anions such as phosphate and citrate,or in its most common form bound to proteins (mainly albumin). Of these, the ionized calcium is the physiologically important form.

Ionized calcium is most useful clinically when trying to evaluate abnormally high or low serum calcium levels. Measurement of serum ionized calcium provides insight into the effect of total protein and albumin on serum calcium levels.

This test is also useful in evaluating an individual that may have conditions that abnormally effect serum proteins. However Total Serum Calcium remains the first line test for evaluation of calcium abnormality. It should also be noted that women have greater circadian variation of ionized calcium than men.

Recommended For:

Evaluating the effect of albumin on the calcium level, the parathyroid glands function, liver diseases that affect the level of albumin in the blood, and calcium metabolism.

Special Notes:

No special preparation is necessary prior to blood sample collection.

Tests Included:

Calcium, Ionized, Serum (306)
Calcium, Ionized, Serum (004804)

Estimated Turn Around For Results:

2-10 Business Days

For an exact turnaround time for results, please contact us at Personalabs and we will contact the lab on your behalf as turnaround times vary depending on testing location or lab testing provider.

  • Step 1 - Order Your Test

    Create an account, choose your tests, checkout securely, generate your lab order.

  • Step 2 - Generate & Print Out Lab Order

    Our physician network will approve your order within 2-4hrs. Some lab orders can take 24 hours for approval.

  • Step 3 - Visit the Lab

    The test price decides which lab you will visit: Quest or Labcorp. Find a location in your area.

  • Step 4 - Get Your Results

    Results can be provided in as little as 24-48 hrs. For more complex tests, please contact us for turn around times.


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