Retinol Binding Protein

For Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.

Test Code

CPT Codes

Preferred Specimen
2 mL serum

Patient Preparation
Fasting for at least 12 hours is required

Minimum Volume
0.5 mL

Transport Temperature
Refrigerated (cold packs)

Specimen Stability
Room temperature: 24 hours
Refrigerated: 20 days
Frozen: 180 days

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

Fixed Rate Time Nephelometry

Setup Schedule
Tuesday, Friday Night
Report available: 4 Days

Reference Range
≤17 yearsNot established
≥18 years1.5-6.7 mg/dL

Clinical Significance
RBP may be elevated in patients with renal disease and
diabetes. Concentrations may be decreased in patients
with hepatotoxicity, hepatitis, and cirrhosis.

Performing Laboratory
Quest Diagnostics Nichols Institute-San Juan Capistrano, CA
33608 Ortega Highway
San Juan Capistrano, CA 92675-2042

Last Updated: December 6, 2021

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.