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Test Code 099 Urea Nitrogen Urine, Random

Additional Codes


PowerChart: Urea Nitrogen Random Urine

MA Cerner: Urea Nitrogen, Random Urine

Specimen Requirement

0.5 mL urine is required.

Additional Specimen Collection Information

Collect a random urine specimen in a sterile container. No preservative is required. Label the specimen appropriately with two identifiers, patient name and another identifier, (patient ID number, DOB, etc.) include date and time of collection. 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 completed within 4 hours; Mercy DV and MA West within 24 hours

CPT Code Information

84540 Chemistry: Urea Nitrogen; Urine

LOINC Code Information

2665-8 Nitrogen [Mass/Time] In Urine

Test Method

Enzymatic-Conductivity Rate Method; Beckman DXC880i

Reference Values

Reference values are not established for random urine specimens. Results are subject to interpretation by the clinician.