Phosphate, Random Urine with Creatinine [1696X]

Test Code

15824

CPT Codes
84105, 82570

Preferred Specimen

10 mL random urine, collected in a plastic urine container

Minimum Volume

2 mL

Other Acceptable Specimens

Unpreserved urine collected in urinalysis transport tube (yellow-top, blue fill line, preservative tube) • Preserved urine with 6N HCl acid submitted in a plastic urine container

Instructions

Adjust pH to <3.0 with 6N HCl prior to aliquoting for phosphate testing.

Transport Temperature

Preserved urine: Room temperature
Unpreserved urine: Refrigerated (cold packs)

Specimen Stability

Preserved urine
Room temperature: 6 months
Refrigerated: 6 months
Frozen: 6 months

Unpreserved urine
Room temperature: 48 hours
Refrigerated: 7 days
Frozen: 28 days

Methodology
Spectrophotometry (SP)

Setup Schedule

Set up: Daily; Report available: 1 day

Reference Range

See Laboratory Report

Clinical Significance

Phosphorus is present in many foods with a mean intake of approximately 1500 mg per day for adult males and about 1000 mg per day for adult females. Absorbed phosphate, under the influence of parathyroid hormone, is readily excreted in the kidney. Measurement of urinary phosphorus generally reflects dietary intake; hence, day-to-day excretion may show considerable variation.

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.