Uric Acid, 24-Hour Urine with Creatinine [907X]

Test Code

90788

CPT Codes
82570, 84560

Includes

CPT code 81050 may be added at an additional charge for volume measurement

Preferred Specimen

10 mL aliquot of a well-mixed unpreserved 24-hour urine, submitted in a plastic leak-proof container

Minimum Volume

2 mL

Other Acceptable Specimens

Well-mixed unpreserved 24-hour urine submitted in an UA Urinalysis Transport Tube

Instructions

Do not acidify the urine. Please aliquot for uric acid testing prior to addition of any acid for those tests requiring preservative.
Do not include first morning specimen; collect all subsequent voidings. The last sample collected should be the first morning specimen voided the following morning at the same time as the previous morning’s first voiding. Specify 24-hour total volume on container and test requisition.

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 13 days
Refrigerated: 13 days
Frozen: 28 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Acid preserved urine

Methodology
Spectrophotometry (SP)

Setup Schedule

Set up: Daily; Report available: Next day

Reference Range

See Laboratory Report

Clinical Significance

Urine uric acid may supplement serum uric acid testing when trying to identify conditions in which there is alteration of uric acid production or excretion, e.g., gout, leukemia, renal disease. The amount of uric acid excreted may be useful in treating asymptomatic hyperuricemia. Measurement of urine uric acid is important in the investigation of urolithiasis.

Performing Laboratory

Quest Diagnostics Nichols Institute

14225 Newbrook Drive

Chantilly, VA 20153

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.