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Geisinger Medical Laboratories Test Catalog
UREA NITROGEN, RANDOM URINE |
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ORDERING INFORMATION: |
Geisinger Epic Procedure Code: LAB3212 Geisinger Epic ID: 23560 | |
SPECIMEN COLLECTION |
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Specimen type: |
Random urine | |
Preferred collection container: |
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Specimen required: |
5 mL aliquot of random urine. | |
Special notes: |
Urine containing preservatives is not acceptable. | |
| SPECIMEN PROCESSING |
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Transport temperature: |
Refrigerated (preferred) or room temperature. | |
Specimen stability: |
Room temperature: 2 days. Refrigerated: 7 days. Frozen: 4 weeks.. | |
Rejection criteria: |
Urine containing preservatives is unacceptable. | |
TEST DETAILS |
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CPT code(s): |
84540 | |
| Note: The billing party has sole responsibility for CPT coding. Any questions regarding coding should be directed to the payer being billed. The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only. | ||
Methodology: |
Spectrophotometric (Colorimetric) |
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Synonyms: |
UNUR
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Clinical significance: |
About 80% of urinary nitrogen is in the form of urea, which is the major end product of protein metabolism. Urea excreted in the urine is the primary method of nitrogen elimination; therefore, this test provides an approximate evaluation of nitrogen balance. Conditions associated with increased urea nitrogen are hypothyroidism, high-protein diets, and postoperative states. Decreased levels are associated with convalescence, liver disease, toxemia, and advanced renal disease. | |
Doctoral Director(s:) |
Hoi-Ying Elsie Yu, PhD, DABCC Sheng-Ying (Margaret) Lo, PhD, DABCC |
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| Review Date: | 12/14/2022 | |