Specimen Preparation: Transfer 10 mL aliquot from a well-mixed 24-hour urine collection to ARUP Standard Transport Tubes. (Min: 2 mL) Do not use preservatives.
Storage/Transport Temperature: Refrigerated. Also acceptable: Room temperature or frozen.
Remarks: 24 hour volume required.
Stability (collection to initiation of testing): Ambient: 1 week; Refrigerated: 1 week; Frozen: 3 years
Reference Interval:
By report
CPT Code(s):
84999
Cross References:
Nitrogen Balance (Nitrogen, Total, Urine)
, Total Urinary Nitrogen
