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To view specimen requirements and codes please select your laboratory:

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Test Code


CPT Code(s)


Preferred Specimen(s)

1 mL serum

Minimum Volume

0.5 mL

Transport Container

Serum Separator Tube (SST®)

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 7 days
Refrigerated: 14 days
Frozen: 4 months

Reject Criteria

Gross hemolysis • Grossly lipemic


Immunoturbidimetric Assay

Performing Laboratory

Quest Diagnostics - West Region

Setup Schedule

Set up: Tues-Sat 1st shift (cutoff 6 a.m.); Report avilable: 3 days

Reference Range(s)

≤5 Days 6-21 mg/dL
6 Days-12 Months   Not established   
1-5 Years 14-30 mg/dL
6-9 Years 15-33 mg/dL
10-13 Years 20-36 mg/dL
14-17 Years 22-45 mg/dL
Adult Males 21-43 mg/dL
Adult Females 17-34 mg/dL

Clinical Significance

Prealbumin is decreased in protein-calorie malnutrition, liver disease, and acute inflammation. It may be used as an indicator of nutritional requirements and response to therapy during total parenteral nutrition and as a biochemical marker of nutritional adequacy in premature infants.

Alternative Name(s)

Transthyretin, Thyroxine Binding Prealbumin

LOINC®' Code(s)

The Result and LOINC information listed below should not be used for electronic interface maintenance with Quest Diagnostics. Please contact the Quest Diagnostics Connectivity Help Desk for more information at 800-697-9302.

NOTE: The codes listed in the table below are not orderable Test Codes.

Result NameLOINC CodeComponent Name

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

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.

LOINC assignment is based on a combination of test attributes, including the method used by the performing laboratory. For tests not performed by Quest Diagnostics, codes are assigned by the performing laboratory.

* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.