Chloride with Creatinine, 24-Hour Urine [368X]

Test Code

36889

CPT Codes
82436, 82570

Includes

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

Preferred Specimen

10 mL of an unpreserved aliquoted 24-hour urine collected in a plastic leak-proof container

Minimum Volume

2 mL

Other Acceptable Specimens

24-hour urine, submitted in a UA Urinalysis transport tube (yellow-top, blue fill line preservative tube) • Preserved urine with Boric Acid, Acetic Acid, HCl, and submitted in plastic, leak-proof container

Instructions

Record total volume and collection time on specimen container and requisition.

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 7 days
Refrigerated: 7 days
Frozen: 28 days

Methodology
Ion Selective Electrode (ISE)

Setup Schedule

Set up: Daily; Report available: 4 days

Reference Range

See Laboratory Report

Clinical Significance

Urine chloride excretion approximates the dietary intake. The chloride content of most foods parallels that of sodium. An increase in urine chloride may result from water deficient dehydration, diabetic acidosis, Addison's Disease, and salt-losing renal disease. Decreased urine levels are seen in congestive heart failure, severe diaphoresis and in hypochloremic metabolic alkalosis due to prolonged vomiting.

Performing Laboratory
Quest Diagnostics Nichols Institute Valencia
27027 Tourney Road
Valencia, CA 91355-5386

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.