Osmolality, Serum

Cleveland HeartLab O, Test

NEW YORK DOH APPROVED: YES
CPT Code: 83930
Order Code: C1304
ABN Requirement: No
Specimen: Serum
Volume:  1.0 mL
Minimum Volume:  0.5 mL
Container: Gel-barrier tube (SST, Tiger Top)

Collection:

  1. Collect and label sample according to standard protocols.
  2. Gently invert tube 10 times immediately after draw. DO NOT SHAKE.
  3. Allow blood to clot 30 minutes.
  4. Centrifuge for 10 minutes.

Transport:   Store serum at 2°C to 8°C after collection and ship the same day per packaging instructions provided with the Cleveland HeartLab shipping box.

Stability:

Ambient (15-25°C): 7 days
Refrigerated (2-8°C): 7 days
Frozen (-20°C): 28 days
Deep Frozen (-70°C): 28 days

Causes for Rejection: Grossly hemolyzed or hyperlipemic samples; specimens other than serum; improper labeling; samples not stored properly; samples older than stability limits

Methodology: Freezing Point Depression

Turn Around Time: 3-4 days

Reference Range:

Age mOsm/kg
All Ages 278-305

Clinical Significance: Serum osmolality is increased in hypernatremia, hyperglycemia, uremia, ethanol, methanol, or ethylene glycol overdoses, and in diabetes insipidus.

The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.