How To Pay Your Quest Diagnostics Bill

Updated August 22, 2023 – If you have a bill from Quest Diagnostics, you have several options to make payment. You can pay:

  • Online: Go to and make your payment, no login necessary. You will need the Lab Code and Bill Number from your bill.
  • By Mail: Quest Diagnostics has multiple payment addresses depending on where you are in the country. See your bill for the correct payment address for you.
  • By Phone: The Quest Diagnostics customer service phone number for payments is 866-697-8378.