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HelpTest Code UOSMS Osmolality, Serum
Reporting Name
Osmolality, SUseful For
Evaluating acutely ill or comatose patients
Method Name
Freezing Point Depression
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
SerumSpecimen Required
Collection Container/Tube:
Preferred: Red top
Acceptable: Serum gel
Submission Container/Tube: Plastic vial
Specimen Volume: 2 mL
Collection Instructions: Centrifuge and aliquot serum into a plastic vial.
Specimen Minimum Volume
0.25 mL
Reject Due To
| Gross hemolysis | OK |
| Gross lipemia | OK |
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 7 days | |
| Frozen | 7 days | ||
| Ambient | 24 hours |
Reference Values
275-295 mOsm/kg
Day(s) Performed
Monday through Sunday
CPT Code Information
83930
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| UOSMS | Osmolality, S | 2692-2 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| UOSMS | Osmolality, S | 2692-2 |
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.