Call LabCorp customer service faster with GetHuman. 888-522-2677. Customer service. Current Wait: 13 mins (12m avg) Hours: Mon-Fri 8am-5pm EST; best time to call: 8:10am. Get targeted help: Tell us the issue so we get you to right rep, offer relevant tips, reminders & follow-up! I need my results I need to change my appointmen I have a billing ....