CALCIUM, URINE, 24 HOUR

Test Code

LAB8119

CPT Codes
82340

Preferred Specimen

24 Hour Urine Container without preservative

Patient Preparation
Discard first morning urine on day of collection and note the time. Then collect all urine voided the next 24hours. Refrigerate the urine durine entire collection. See instructions below.

Minimum Volume

5 mL aliquot (20 mL aliquot optimal)

Instructions

Mix the specimen well and measure the 24 Hour volume (RECORD TOTAL VOLUME). Pour off 20 mL of urine into a separate plastice screw-cap container. Refrigerate if not tested immediately.

Transport Container

Transfer tube

Transport Temperature

Refrigerate

Specimen Stability

2-8°C up to 7 days

Methodology
Arsenazo III

Setup Schedule

M, T, W, Th, F, Sa, Su

As received; STAT testing is available

Reference Range

100 - 300 mg/day

Clinical Significance

Differentiates between hypercalciuria and hypocalciuria and aids in the differential diagnosis of nephrolithiasis.

Performing Laboratory
Alverno Central Lab

Additional Information
24 Hour Urine Collection Instructions

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.