Calcium, Ionized
Test code
CPT code(s)*
Test resources
Details
Methodology
Ion Specific Electrode (ISE)
Alternative name(s)
CA++,CA, Ionized,Calcium Free,Calcium, Free,Free CA,Free Calcium,Ionized CA,Ionized Calcium
Specimen requirements | |
|---|---|
| Patient preparation | None Specified |
| Preferred specimen(s) | 2 mL serum collected in a gel barrier tube |
| Alternative specimen(s) | SST (red/black-top) tube |
| Minimum volume | 0.6 mL |
| Collection instructions | Let clot and spin immediately with the cap on. Do not open tube. Ship the unopened gel barrier tube at room temperature. |
| Transport container | Unopened gel barrier tube |
| Transport temperature | Room temperature |
| Specimen stability | Room temperature: 7 days Refrigerated: 7 days Frozen: Unacceptable |
| Reject criteria | Gross hemolysis • Grossly lipemic • Received frozen • Red-top tube (no gel) |
Reference Range(s)
| <8 Months | 5.3-6.3 mg/dL |
| 8-11 Months | 5.2-6.1 mg/dL |
| 1 Year | 5.1-6.0 mg/dL |
| 2 Years | 4.9-5.8 mg/dL |
| 3 Years | 4.9-5.7 mg/dL |
| 4-6 Years | 4.8-5.7 mg/dL |
| 7-12 Years | 4.8-5.6 mg/dL |
| 13-17 Years | 4.8-5.5 mg/dL |
| 18-89 Years | 4.7-5.5 mg/dL |
| ≥90 Years | 4.5-5.5 mg/dL |
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 guidance 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.
This material contains content from LOINC® (http://loinc.org). The LOINC Table, LOINC Table Core are copyright © 1995-2019, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license.
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