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HelpTest Code UOSMU Osmolality, Random, Urine
Reporting Name
Osmolality, UUseful For
Assessing the concentrating and diluting ability of the kidney
Method Name
Freezing Point Depression
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
UrineSpecimen Required
Supplies: Urine Tubes, 10 mL (T068)
Container/Tube: Plastic, 10-mL urine tube
Specimen Volume: 5 mL
Collection Instructions: Collect a random urine specimen
Specimen Minimum Volume
1 mL
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Refrigerated (preferred) | 7 days | |
| Frozen | 7 days |
Reference Values
0-11 months: 50-750 mOsm/kg
≥12 months: 150-1,150 mOsm/kg
Day(s) Performed
Monday through Sunday
CPT Code Information
83935
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| UOSMU | Osmolality, U | 2695-5 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| UOSMU | Osmolality, U | 2695-5 |
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.Forms
If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.