Calcium, Timed Urine

Sunquest Code:UCAT  
Epic Code:LAB3819Epic Name:Calcium Timed Urine
Order Instructions:Order UCRT in addition to UCAT. Enter collection volume and duration.
Methodology:Bichromatic end point
CPT Code:82340, 81050
Test Includes:Urine calcium and creatinine.
Turnaround Time:Performed and reported 24 hours/day.
Associated Links:

Urine Collection Procedure

Collection Instructions

Specimen:Urine, timed collection (20 to 28 hours)
Optimal Volume:Submit entire collection; analysis requires 1 mL
Collection Instructions:Place specimen on ice or in refrigerator during collection.

Processing and Shipping

Specimen Processing:Mix collection well before aliquot is taken. Aliquot 5 mL, 1 mL minimum. Store in refrigerator.
Shipping Instructions:Ship at refrigerated temperature.
Test Performed at or Referral Lab Chemistry  (UMMC-West Bank, UMMC-East Bank, Fairview Ridges - FRH, Fairview Northland - FNMC, Fairview Southdale - FSH)


Reference Range:

Ca free diet

0.005-0.040 g/24 h

Low to average Ca intake

0.05-0.15 g/24 h

Average Ca intake

0.1-0.3 g/24 h





1)     Suspect hypocalcemia or hypercalcemia.

2)     Monitor treatment for calcemic disorder.



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