Quick Reference
- Full form
- Calcium Ionized (Serum)
- Sample type
- Blood
- Fasting
- Not required
- Marker measured
- 1
- Report turnaround
- Same day
- Available at
- All locations
About Calcium Ionized (Serum)
Ionized calcium measures the biologically active form of calcium in your blood, giving a more precise reading than total calcium in certain situations, particularly for critically ill patients or those with abnormal protein levels.
No fasting is required, and results are available the same day.
How to Prepare
- No fasting required.
- No special preparation needed before your blood draw.
Frequently Asked Questions
How is ionized calcium different from total calcium?
Ionized calcium measures the biologically active form directly, giving a more precise reading, especially when protein levels are abnormal.
Do I need to fast before this test?
No fasting is required.
Who typically needs ionized calcium testing?
Critically ill patients or those with abnormal protein levels, where total calcium may not accurately reflect true calcium status.
What can cause abnormal ionized calcium?
Kidney disease, parathyroid gland problems, and certain medications can all affect calcium levels.
How soon will my report be ready?
Same day.
Is home sample collection available?
Yes, in all City Care Lab service areas.
This page provides general health information and is not a substitute for medical advice. Speak with your doctor about your specific results and treatment.