Test ID: OSMO
CPT code: 83930
LOINC: 2692-2
Specimen Type: SERUM OR PLASMA
Frequency: Setup: Daily; TAT <24 hours
Instructions: 1.0mL serum or plasma.
Text: Evaluate acutely ill and comatose patients. Increased gap between
measured and calculated osmolality may indicate ingestion of poison,
ethylene glycol, methanol, or isopropanol.
Methodology: FREEZING POINT