You can contact LabCorp online through the company's website, labcorp.com. You can also contact the company's billing department by mail or phone. As of 2015, the phone number is 800-845-6167.
To contact LabCorp online, you can navigate to the company's website, select the Contact Us option at the top of the page, and then select Contact LabCorp in the Patients section. You can submit a question or comment about your lab visit or about the company's website. You should not include any personal information when you use the online contact form. If you wish to contact LabCorp's billing department online, you can do so by using a special online contact form. In this case, you need to provide your invoice number and zip code.