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Alphabetical Index
CALCIUM (8000100148)
Test Mnemonic:

CA 
Specimen Requirements:
Collection:

 

Serum separator tube (SST) (Preferred), Plasma separator tube (PST) or red stopped vacutainer tube.
Minimum Volume:

3 mL of blood
Storage/Transport:

 

Delivered to Sample Management within 2 hours of collection.
Stability:

Room temperature ≤4 hours; Refrigerated ≤22 days; Frozen ≤1 year. (Avoid repeated freeze/thaw cycles).       
Causes for Rejection:

Incomplete and/or incorrect sample identification, improper storage/transport, and gross hemolysis or lipemia.             
Specimen Preparation:

Allow specimen to clot completely at room temperature. Centrifuge to separate serum from cells within 2 hours of collection. For red-topped vacutainer tube, transfer serum from collection tube to labeled plastic transport tube. 
Methodology:

Colorimetric
Performed:

Clinical Chemistry                      
Turnaround Time:

Routine: 8 hours; ASAP: 4 hours; STAT: 1 hour
Reference Range:

By report (reports may vary based on instrumentation, patient age and sex).
CPT 4 Code:

82310
Effective Date: 05/29/2015
Reviewed By/Date: Okorodudu, Anthony - 05/14/2019
Approved By/Date: Okorodudu, Anthony - 12/20/2022
When ordering tests for which Medicare or Medicaid reimbursement will be sought, physicians should only order tests that are medically necessary for the diagnosis or treatment of the patient. Components of the organ or disease panels may be ordered individually. The diagnostic information must substantiate all tests ordered and must be in the form of an ICD-10 code or its verbal equivalent.

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