Phenylalanine and Tyrosine are used in the monitoring of patients with phenylketonuria (PKU) who are on special diets. Tyrosine analysis can also be used for monitoring of patients with tyrosinemia.
Separate plasma from cells as soon as possible and freeze below -20
Collect specimen after an overnight fast (or at least 4 hours after a
meal) if possible. Non-fasting samples are acceptable for pediatric
Reported (Analytical Time)
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.
**This test is for New York patient testing only. For Non-New York patient testing, use test code 37356.** Transport Temperature: Frozen Methodology: Chromatography/Mass Spectrometry