

Be sure to write the invoice number(s) on the check or money order to make sure the payment is credited to the account.Īlso, confirm that you have the payment coupon linked to the invoice.Pay By Phone

Use the bank statement or invoice address to send the check/invoice or money order to QuestDiagnostics. You need the lab code and invoice number from your invoice. Go to and make your payment without logging in. What Are The Payment Methods Offered By Quest Diagnostic Quest Diagnostics Bill also has collaboration agreements with various hospitals and clinics around the world. Quest is a Fortune 500 company and operates in the United States, Puerto Rico, Mexico, and Brazil. Quest Diagnostics is an American clinical laboratory.
