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Test Code 097 Urea Nitrogen Urine, Timed

Additional Codes


PowerChart: Urea Nitrogen Timed Urine

MA Cerner: Urea Nitrogen, Timed Urine

Specimen Requirement

0.5 mL urine is required.

Additional Specimen Collection Information

Collect a 24 hour urine specimen in a sterile container. No preservative is required. Keep the specimen chilled during the collection period. Label the specimen appropriately with two identifiers, patient name and another identifier, (patient ID number, DOB, etc.) include specimen source, date and time of collection. Record the collection time period on the label and specimen container. Store the urine specimen refrigerated and transport to the lab within 48 hours.

Useful For

Assessment of protein intake and/or nitrogen balance


Testing is performed Monday through Sunday.

Typically assayed within 2 hours after specimen arrives at testing site; Mercy DV and MA West within 24 hours.

CPT Code Information

84540 Chemistry: Urea Nitrogen; Urine

LOINC Code Information

12967-6 Urea Nitrogen [Mass/Volume] In 24 Hour Urine

Test Method

Enzymatic-Conductivity Rate Method; Beckman DXC880i

Reference Values

12 - 20 gm/24 hours