Test Center

My Recent Searches

  • No Recent Search.

My Tests Viewed

  • No Test Viewed.
Test Name

Calcium, Ionized

To view specimen requirements and codes please Select a regional laboratory.

Not sure which laboratory serves your office? Call us 866-MYQUEST (866-697-8378)

CPT Code(s)**

82330
**IMPORTANT: CPT Code is informational only; obtain the Test Code for ordering.

Methodology

Ion Selective Electrode (ISE)

Reference Range(s)

<8 Months  Not established
8 Months-10 Years 4.9-5.4 mg/dL
11-17 Years 4.8-5.3 mg/dL
Adult 4.8-5.6 mg/dL

Clinical Significance

Ionized calcium represents the true "bioavailable" calcium in the circulation. In situations where the total calcium is normal but does not fit the clinical picture, e.g. , hyperparathyroidism, a determination of the ionized calcium will, many times, show an elevation in the "bioavailable" calcium component. This may be due to alterations in protein concentrations, especially albumin, that binds most of the calcium in the circulation.

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.

* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.

306
306
306
306
306
306
19950E
93800Q
306
19950E
19950E
306
306
306X
19950E
306
306
306
306
306
306
306
306
Calcium, Ionized
306