This is a Proprietary Laboratory Analyses (PLA) code, meaning that the code applies to only one unique lab test made by a specific manufacturer or performed by a specific lab. Report 0381U only for Branched–Chain Amino Acids, SelfCollect, Blood Spot, from Mayo Clinic. The test evaluates a patient–collected blood spot specimen for levels of allo–isoleucine, leucine, isoleucine, and valine using liquid chromatography with tandem mass spectrometry (LC–MS/MS).
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