Test Code 24CAL Calcium, 24hr Urine
Performing Laboratory
MaineGeneral Medical Center
Reference Values
25 - 300 mg/24hr
Day(s) Test Performed
Monday through Sunday
Specimen Requirements
2 mL from a 24-hour urine collection. No preservative. Mix well before taking 2-mL aliquot. (An entire 24-hour urine collection is also acceptable.) Refrigerate specimen during collection, and send specimen refrigerated in a plastic urine container.
See “Urine Collection” in “Special Instructions” for 24-hour specimens.
Label specimen with patient’s name (first and last), date of birth, date and time of collection, and collector’s initials and the volume collected.
Specimen stability: 14 days at 2-8°C (Refrigeration preferred)
30 days at frozen at ≥-20°C
72 hours at room temperature
Minimum volume: 1 mL
Test Classification and CPT Coding
82340 - calcium
81050 - urine timed measurement (if appropriate)