UREA NITROGEN, TIMED URINE

Test Code

LAB449

CPT Codes
84540

Preferred Specimen

Urine, 24 hour collection jug

Minimum Volume

0.5 mL urine

Instructions

Store in refrigerator during collection. Do not add preservatives. Time of collection in hours must be written on label.

Transport Temperature

Refrigerated

Specimen Stability

Ambient: 2 days
Refrigerated: 7 days
Frozen: 1 month

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

Incomplete collection or time of collection not indicated

Methodology
Conductometry

Setup Schedule

Sunday-Saturday

Reference Range

12-20 g/day

Performing Laboratory
West Virginia University Hospital, Inc.
Camden Clark Medical Center
Princeton Community Hospital
United Hospital Center
Wheeling Hospital

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.