Tryptophan Analysis

Test Information

This test is a quantitative measurement tryptophan.

Turnaround Time

10 days

CPT Code(s)

82131

Cost

$100

Specimen Requirements

5-7 ml of whole blood in a green top (sodium heparin) tube OR plasma can removed from spun down sample and sent frozen. A minimum of 0.5 ml of plasma is requested if sending separated.

Transport Instructions

Whole blood should be sent over overnight at ambient temperature. Plamsa can be removed once the sample has been drawn and sent frozen on dry ice. Do not freeze whole blood.

Have Questions? Need Support?

Call our laboratory at 1-800-473-9411 or contact one of our Laboratory Genetic Counselors for assistance.
Robin Fletcher, MS, CGC
Falecia Thomas, MS, CGC

Lucy's Story

When our daughter Lucy had a metabolic crisis at 7 days old, we were shocked and devastated to find out that she was born with a rare genetic disorder (MSUD). Her newborn screening results did not make it back in time to prevent the crisis, and no one at our local hospital was familiar with the disease. They did not know how to treat her. Calls were made to Greenwood Genetic Center to confirm her diagnosis and guide her care. Dr. Champaigne and Ami...

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