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Test Code FREB Retinol Binding Protein

Specimen Required

Draw blood in a plain red-top tube(s), serum gel tube(s) is acceptable. Spin down and send 2 mL of serum refrigerated in a plastic vial.


Required: Fasting for at least 12 hours.

Method Name

Fixed Rate Time Nephelometry

Reporting Name

Retinol Binding Protein

Specimen Type


Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 7 days
  Frozen  90 days

Reject Due To

Hemolysis Mild OK; Gross reject
Lipemia NA
Icterus NA
Other NA

Reference Values

1.5 - 6.7 mg/dL

Day(s) and Time(s) Performed

Tuesday, Friday

Performing Laboratory

Quest Diagnostics Nichols Institute

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FREB Retinol Binding Protein 1836-6


Result ID Test Result Name Result LOINC Value
Z1558 Retinol Binding Protein 1836-6