Test Details



Ordering Code


CPT-4 Code(s)

82140, 82340, 82507, 82570,83735, 83945, 83986, 84105, 84133, 84300, 84392, 84560

Specimen Information


Urine in Renal Stone Risk kit

Specimen Preparation

Send 60.0 mL plain urine and 50.0 mL acidified urine using Renal Stone Risk formation kits. Please follow kit instructions.
1. Upon completion of 24-hour collection in the large orange collection container, tighten the cap on the container and mix contents in the container vigorously for one minute. A good mix will ensure accurate test results.
2. Carefully fill the two plastic white vials with urine collected in the large orange container. The two white vials must be filled within two to four hours of completion. Fill and cap vials one at a time. Cap both vials tightly, write patient's name on each vial and place in zip-lock bags provided (do not remove absorbent sheets).
3. Complete the patient information section.
4. Place specimen in mail-back box and send to Warde Medical Laboratory. DO NOT SEND LARGE ORANGE COLLECTION CONTAINER.
For high urine output: Patient with a high urine output (3.8 L) will require more than one large container. Collect urine in the first container until it is 3/4 full and then begin filling the second container. Carefully follow steps 1 - 4 for each jug and mark one as box 1 of 2, the other box 2 of 2. Note: Urine must only be collected and stored in the large orange collection container. Do not remove sponge from the orange collection container. Do not remove wool from the white container. Do not collect the first urination at the beginning of 24-hour collection. During collection process, store large orange container in a cool location. Transport at room temperature.

Minimum Volume

30 mL plain urine, 30 mL acidified urine

Transport Temperature

Room temperature


Room temperature: 10 days
Refrigerated: 10 days
Frozen: Unacceptable


Calculation, Immunochemiluminometric Assay, Ion Coupled Plasma/Optical Emission Spectrophotometry, Spectrophotometry

Reference Range

See report

Performing Laboratory


New York DOH Approval Status