Patient Billing FAQ
Patient Billing FAQ

Start here to find answers to commonly asked questions about LabCorp’s patient invoices, the online bill payment service, and issues concerning your insurance

General Information

What is Laboratory Corporation of America?
Laboratory Corporation of America (LabCorp) is a clinical laboratory that performs tests at the request of a licensed physician or other person authorized by law to order laboratory testing and receive testing results.

What are LabCorp's Customer Service hours of operation?
LabCorp has facilities located within all regions of the country. Most of the Customer Service centers operate between the hours of 8:00 AM and 5:00 PM. Please refer to your bill for the exact hours of operation of the Customer Service center in your area.

Why have I received a bill from LabCorp?
LabCorp has received information from either your ordering physician or your insurance company indicating patient responsibility for testing services. For further information about the specific nature of the bill, please contact our Patient Billing department at 800-845-6167.

Who do I speak with about the results from my lab testing performed by LabCorp?
The laboratory report is sent to the ordering physician or other authorized person who has requested the test. Please contact your ordering physician for further information regarding your results.

How often will LabCorp bill me?
LabCorp will send you a bill approximately once per month. Payment from you is expected promptly upon receipt of the bill.

How can I get I the telephone number of the Patient Billing department?
A toll free number for Patient Billing should be printed on your bill. If you do not have a bill, or cannot locate the number on your bill, please contact LabCorp at 800-845-6167, and a representative will assist you or transfer you to the correct location.

How does billing work if I have insurance that LabCorp doesn't have a contract with?
LabCorp will send you a bill, and you will be expected to pay the bill in full. LabCorp will provide a claim form for you to submit to your insurance company for reimbursement.

What methods of payment does LabCorp accept?
LabCorp readily accepts payment for laboratory service bills using any of the following methods: Visa, MasterCard, Discover, American Express, personal check, or money order. 

You may mail any payments to: 
PO Box 2240
Burlington, NC

Please remember to attach the stub of the bill when mailing in your payment, and include your 8-digit invoice number on the check.

Why do I need to provide billing information every time I have services performed by LabCorp?
Since LabCorp does not keep a file on individual patients, each invoice number is treated as a new bill. Therefore, we require complete billing information each time testing is requested.

Online Bill Payment

Why did I get an error message that says “Invoice Not Found?”
Please recheck your 8-digit invoice number, and be sure to include the number exactly as it appears on your bill. If you continue to get the same message after reentering your invoice number, please contact our Patient Billing department at 800-845-6167.

Why does my balance still show the same amount after I submit my payment on your Web site?
LabCorp posts payments within a 24 to 48 hour time frame. Your balance on the Web site, however, will not reflect this change until the next billing cycle. If you have made your payment and you are unsure whether the payment has posted, contact the Patient Billing department at 800-845-6167.


How can I find out if my insurance company has paid this claim?
Please read your bill carefully. A line item adjustment will be printed on your bill if we have received payment from the insurance company. If you are still uncertain, you can either contact your insurance company directly or contact the Patient Billing department at 800-845-6167.

How do I file a claim using secondary insurance for the remainder of my lab bill?
If you have more than one insurance policy, you must submit to the secondary insurance company directly with a copy of your Explanation of Benefits (EOB) from your primary insurance company. Mail the bill you received, along with the EOB, to your secondary insurance company’s claim processing address. LabCorp does not automatically file for coordination of benefits with your secondary insurance carrier.

Why didn't my insurance pay this claim?
You should have received an Explanation of Benefits (EOB) from your insurance carrier that explains in detail the services that were either paid or denied. If you need further assistance determining the reason(s) why your insurance company did not pay for your bill, please contact your insurance carrier directly.

How long will it take before my insurance company responds to this claim? 
Please allow your insurance company 4 to 6 weeks to process your claim. If your insurance claim has not been processed in that amount of time, contact your insurance company directly for further information.

What do I do if the information shown on the LabCorp bill does not match the information I’ve been provided by my insurance company?  
If you have received an Explanation of Benefits (EOB) from your insurance company that shows different information than the laboratory bill you have from LabCorp, please forward a copy of your EOB to LabCorp. You may fax this information to 866-227-2939 (toll-free fax) or mail a copy of the EOB to:

PO Box 2240
Burlington, NC 27216-2240


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