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Test Code SER OSMO Osmolality, Serum

Methodology

Freezing Point Depression

Performing Laboratory

Decatur Morgan Hospital-Decatur Campus

Specimen Requirements

Draw blood in a plain, red-top tube(s) or a serum gel tube(s). (Plasma is not acceptable.) Spin down and send 0.5 mL of serum.

Reference Values

275-295 mOsm/kg

Critical values (automatic call-back):  ≤190 mOsm/kg or ≥390 mOsm/kg

Test Classification and CPT Coding

83930