How do I register my kit? April 21, 2020 03:44 Updated After you receive your kit, you can register it here. You will be prompted to enter the unique barcode associated with your kit. Related articles How do I contact Labcorp OnDemand®? What should I do if I sent my kit to the lab before registering it? Where do I find the barcode? How do I track my kit? Will a physician contact me about my results?