LabwiseLabwise › Tests › Metabolic panel (CMP)
Calcium, Ionizedmmol/L
Ionized calcium is the free, active portion of calcium in the blood, unaffected by albumin level.
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What Calcium, Ionized measures
Ionized calcium is the free, active portion of calcium in the blood, unaffected by albumin level.
If your Calcium, Ionized is low
Ionized calcium below the range is commonly associated with low vitamin D, low magnesium, reduced parathyroid activity or kidney function.
Commonly associated with
- Low vitamin D
- Low magnesium
- Reduced parathyroid activity
- Kidney function
If your Calcium, Ionized is high
Ionized calcium above the range means more active calcium in the blood, commonly associated with parathyroid activity, vitamin D excess, some cancers or certain medications.
Commonly associated with
- Overactive parathyroid gland
- High vitamin D intake
- Some cancers
- Thiazide diuretics
Typical reference range
| Group | Typical range |
|---|---|
| Adults | 1.12 – 1.32 mmol/L |
Typical adult values used by many US labs. Your own report prints the range your lab validated for its method, and that range is the one that counts. Labwise always uses the printed range first.
If it is within range
Your ionized calcium is within the range printed by your lab.
Also listed as
Ionized Calcium, Calcium Ionized, Ca++, Free Calcium
Related tests
This page is general information about what a laboratory test measures and what results outside a reference range are commonly associated with. It is not medical advice, does not diagnose any condition and does not replace your clinician. Discuss your results with your healthcare provider.