Geisinger Medical Laboratories Test Catalog

Order Display Name: Geisinger Epic Procedure Code Or ID CPT Code:  


Geisinger Epic Procedure Code: LAB1923             Geisinger Epic ID: 6514

Specimen type:
24-hour urine
Preferred collection container:
Specimen required:
5 mL aliquot of urine; minimum 1 mL.
Special notes:
Specimen may be collected without acid. Estimate total collection volume from 24-hour urine container. Add 30 mL 6N HCl to the 24-hour collection container and mix well prior to removing aliquot. Record total volume on both aliquot tube and request slip (if applicable).

Specimen processing instructions:
If an aliquot is received without the added acid, follow the processing step for Calcium, random urine. 
Transport temperature:
Refrigerated (preferred). Room temperature or frozen specimen also acceptable.
Specimen stability:
Room temperature: 2 days. Refrigerated: 4 days. Frozen: 3 weeks.
Rejection criteria:
Stability limits exceeded.

Reference interval:
Urine calcium: 0.05-0.30 gm/24 hours.
CPT code(s):
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.  The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.
Test includes:
Calcium - 24-hour urine, 24-hour total volume.
Spectrophotometric (Colorimetric)
Clinical significance:
Urinary calcium reflects dietary intake, rate of calcium absorption by the intestine, and bone resorption. Urinary calcium is used primarily to evaluate parathyroid function and the effects of vitamin D.
Doctoral Director(s:)
Hoi-Ying Elsie Yu, PhD, DABCC, FADLM
Sheng-Ying (Margaret) Lo, PhD, DABCC    
Review Date: 12/14/2022

Performing Locations

Geisinger Medical Center

Performing laboratory: Automated Chemistry
Technical Lead: Megan Woodruff
Frequency: Daily, all shifts
Performed STAT? No
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