OSMOLALITY, RANDOM, URINE

Test Code

ROSM

CPT Codes
83935

Preferred Specimen

Yellow round bottom tube

Patient Preparation
None

Minimum Volume

1 mL (5 mL optimal)

Other Acceptable Specimens

Sterile Container

Transport Container

URINE Container

Transport Temperature

Room temperature

Specimen Stability

2-8°C up to 24 hours

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Urine submitted in an additive will be rejected

Methodology
Freezing point depression

Setup Schedule

DAILY, as received

Report Available

STAT: <60 minutes
Routine: <4 hours

Reference Range

Male/Female All Ages: Normal Range: 250-1200 MOSM/KG

Clinical Significance

Osmolality measures the concentration of all chemical particles found in the fluid part of blood. The test helps check body's water imbalance which may be caused due to low sodium (hyponatremia) or water loss, poisoning from harmful substances such as ethanol, methanol, or ethylene glycol, or the kidney problem.

Performing Laboratory
Mount Sinai Hospital
Holy Cross Hospital

The CPT Codes provided in this document 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 payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.