Calcium, Random Urine with Creatinine

Test code

1633

CPT code(s)*

82310, 82570

Not offered in Quest Diagnostics Nichols Institute (IFD) – San Juan Capistrano. Please provide Service area information to confirm Test Code for the lab that services your account or to find available tests you can order.

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Clinical significance

Calcium, Random Urine with Creatinine - This quantitative test, performed with a random urine specimen, may help screen for hypercalciuria, one of the established risk factors for kidney stone formation [1-3]. This test may also help assess metabolic disorders of calcium metabolism, such as hyperparathyroidism, bone disease, and idiopathic hypercalciuria. To adjust for the concentration differences in random urine specimens, calcium to creatinine ratio is included in the results. In general, 24-hour urine specimens are preferred to random urine specimens when measuring calcium for diagnostic evaluation of hypercalciuria [1].Calcium is essential for bone formation and nerve, muscle,…

Test resources

None found for this test
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Details

Test details

Methodology

Spectrophotometry (SP)

Specimen requirements
Patient preparation	None Specified
Preferred specimen(s)	10 mL random urine
Alternative specimen(s)	Unpreserved urine collected in urinalysis transport tube (yellow-top, blue fill line, preservative tube) • Preserved urine with 6N HCl acid submitted in a plastic, urine container
Minimum volume	2 mL
Collection instructions	Collect 10 mL random urine in a plastic screw-cap container and adjust pH to <2 with 6N HCl. Aliquot urine specimens and send at room temperature to the laboratory. or It is acceptable to add preservative after collection if urine is refrigerated during collection. Record total volume and collection time on specimen container and requisition.
Transport container	Plastic urine container
Transport temperature	Room temperature
Specimen stability	Room temperature: 5 days Refrigerated: 35 days Frozen: 6 months

Reference range(s)

See Laboratory Report

LOINC® codes

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Service Area Information

Performing lab & setup schedule

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Service Area Information

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.