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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 frozen plasma from an EDTA (Lavender Top) tube.
Mix sample thoroughly.
Centrifuge and separate the plasma from the cells
at room temperature within 1 hour of collection and
freeze sample immediately for transport and label
specimen vial as 'frozen plasma from Lavender'

Minimum Volume

0.5 mL

Specimen Stability

Freeze (up to 6 months @-20, 1 year @ -70)


Radioimmunoassay (RIA)

Performing Laboratory

National Jewish Medical & Research Center

Setup Days

Set up days at NJC: Batched once a month

Report Available

Reports in 30 days

Reference Range(s)

0-2830 ng/mL

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.