Chloride, 24-Hour Urine with Creatinine

Test Code

368

CPT Codes
82436, 82570

Includes

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

Preferred Specimen

10 mL aliquot of a 24-hour urine collected in a no preservative plastic urine container

Other Acceptable Specimens

Urine preserved with boric acid • Urine preserved with acetic acid • Urinalysis transport tube (yellow-top, blue fill line, preservative tube)

Instructions

Record total volume and collection duration on specimen container and test requisition.

Transport Container

Plastic urine container

Transport Temperature

Room temperature

Specimen Stability

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

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

Urine preserved with HCl

Methodology
Ion Selective Electrode (ISE)

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-Seattle

1737 Airport Way S Suite 200

Seattle , WA 98134-1636

Last Updated: November 6, 2024

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.