CPT 4 Code: 84105

Test Order Mnemonic: PHOS UR

Test Includes: Volume and hours of collection, concentration, and amount excreted

Lab: Clinical Chemistry

Request Form: Write in on Routine Chemistry Form 1- Urine Chemistries

Collection: 24-hour Urine - Discard early morning specimen; start timing from this point. Collect all urine for the next 24 hours, including sample voided at the same time the next morning. Note the time of the last collection on the request form.

Storage Instructions: 2-8°C (refrigerate) during collection and until delivered to the laboratory

Causes for Rejection: Urine collected in preservative

Availability: Samples are received 24 hours per day at Sample Management, 5.136 McCullough.

Turnaround Time: 24 - 48 hours

Special Instructions: Record collection start and finish times on the request slip.

Specimen: Urine

Volume: Preferred: entire collection; Acceptable: aliquot, if volume is measured and written on the request slip

Minimum Volume: 7 mL

Container: 2 liter brown plastic jug or glass tube without any additives

Reference Ranges: 0.3-1.3 g/24 hours

Test Method: Colorimetric

Reviewed/revised April 2007 by P. Harris