By Alexey Spasskiy · Published November 1, 2026 · 8 min read
Quick answer: The one Labcorp fax number printed on Labcorp's patient pages is 866-227-2939. It belongs to Patient Billing and takes a copy of your Explanation of Benefits (EOB) when it doesn't match your Labcorp bill. Records requests go through the patient portal, a patient service center or the Privacy Officer. Lab orders go electronically from your doctor or on paper in your hand. Patient service centers list a local fax on their location pages.
Search for a Labcorp fax number and you get a dozen numbers from directory sites, most of them belonging to one lab, one department or one clinic's account. Labcorp's own website prints far fewer, and each has one job. This guide maps every route Labcorp lists for patients and ordering offices.
Faxing a Labcorp form from home? mFax sends it from your phone or browser, and you can try it free for 7 days. Once Labcorp's machine confirms every page, you can download a PDF receipt. For a practice that sends orders and records every week, mFax Business adds the practice's own fax number and a signed BAA.
Labcorp Fax Number and Contacts at a Glance
Every number below comes from a Labcorp page, linked in the last column and checked on 2026-11-13. If a route has no number here, the Labcorp pages we read don't print one, and we don't copy one from a directory site.
| What you need | Labcorp route | Number or channel | Source (checked on 2026-11-13) |
|---|---|---|---|
| Your EOB doesn't match your Labcorp bill | Patient Billing | Fax 866-227-2939, or mail P.O. Box 2240, Burlington, NC 27216-2240 | Labcorp billing & insurance |
| Any other billing question | Patient Billing | Call 800-845-6167, Mon–Fri, 8 a.m.–5 p.m. ET | Labcorp billing & insurance |
| Copies of your lab records | Portal, patient service center, HIPAA Patient Request Form or Privacy Officer | No fax in the privacy notice. Privacy Officer: 877-234-4722 | HIPAA Notice of Privacy Practices |
| Your test results | Labcorp Patient portal or the MyLabcorp app | Online | Labcorp results FAQ |
| A lab order for your visit | Sent electronically by your doctor, or a paper form you bring | No fax line on Labcorp's patient pages | Labcorp patient FAQ |
| One patient service center | That location | Local fax on its location page | Labcorp locations |
| A Good Faith Estimate | Clinical Contact Center | Call 800-762-4344, Mon–Fri, 8 a.m.–5 p.m. ET | Labcorp billing & insurance |
| Ordering offices: results, resends, add-on tests | Labcorp Link, or your local laboratory | Online portal | Labcorp provider FAQ |
Confirm the number before anything with health details goes out
Fax numbers labelled "Labcorp" on third-party sites often belong to one lab, a hospital's account or an older contact sheet. Check the number on the Labcorp page or on the paperwork Labcorp sent you before you press Send.
What the Labcorp Billing Fax Number Is For
The Labcorp billing fax number, 866-227-2939, is for one case on Labcorp's billing page: your bill doesn't match your insurer's Explanation of Benefits. In Labcorp's words, "send us a copy of your EOB via fax (866-227-2939) or mail (P.O. Box 2240, Burlington, NC 27216-2240), and we'll review it for accuracy."
Labcorp asks for one more thing: your Labcorp invoice number, so the team can find the account quickly. Write it on the EOB or on the cover sheet before you send it.
For anything else about a bill, Labcorp points you to Patient Billing at 800-845-6167, Monday through Friday, 8 a.m. to 5 p.m. ET. Payments go through the Labcorp Patient portal, the phone line or a kiosk at a patient service center, not the fax.
How to Fax Your EOB to Labcorp Billing
Get the EOB as a file
Download it from your insurer's portal, or snap the paper copy with the camera scanner in the mFax app for iPhone, iPad or Android. Edge detection and auto-crop turn it into a fax-ready PDF.
Add your Labcorp invoice number
Type it onto the EOB in the app's PDF editor, or use our free browser-based PDF editor. Nothing is uploaded there; the file stays in your browser.
Send it to 866-227-2939
Open mFax, choose New Fax, enter +1 866 227 2939, attach the EOB and a copy of your bill if it helps, and press Send.
Keep the receipt
The fax shows Delivered once Labcorp's machine confirms every page. Download receipt saves a PDF you can quote if you call Patient Billing later.
Is There a Labcorp Fax Number for Medical Records?
Not one that Labcorp prints. Its privacy notice gives no fax number for medical records requests. The HIPAA Notice of Privacy Practices lists four ways to get a copy of your records:
- Ask for a courtesy copy at a Labcorp patient service center.
- Open a patient portal account to receive your lab reports electronically.
- Complete Labcorp's HIPAA Patient Request Form.
- Contact Labcorp's Privacy Officer.
Labcorp says it provides a copy or a summary "usually within 30 days of your request" and may charge "a reasonable, cost-based fee."
The notice names the HIPAA Patient Request Form, but on 2026-11-13 it didn't link the form or say where to send it. Ask the Privacy Officer for the current form and the submission address. Labcorp lists three contacts for the Privacy Officer:
- Phone: 877-234-4722 (877-23-HIPAA); ask for the Labcorp HIPAA Privacy Officer
- Email:
privacyofficer@Labcorp.com - Mail: HIPAA Privacy Officer, LabCorp, 531 South Spring Street, Burlington, NC 27215
The right to these copies is federal. A 2014 rule lets patients get completed test reports directly from labs covered by HIPAA (Federal Register, February 6, 2014). For records held by doctors and hospitals, see our guide to faxing medical records.
If Labcorp gives you a fax number for the form
Fax it with a cover sheet marked Confidential, send the form and any proof of authority in one transmission, and keep the receipt until the copies arrive. Labcorp counts its 30 days from your request.
Is There a Labcorp Fax Number for Results?
Labcorp's results FAQ gives patients no fax line for results. Labcorp sends results to your Labcorp Patient account and the MyLabcorp app "at the same time they are reported to your healthcare provider," unless state or federal law restricts the timing.
Labcorp's results FAQ says many tests are reported within 24 to 48 hours. Some take up to two weeks, and genetic tests up to 21 days. If more than two weeks have passed and your results aren't posted, Labcorp suggests three steps. Check that your portal details are current, confirm that your provider has the same details on file, and then contact the Clinical Contact Center through the online Labcorp Patient Inquiry Form.
Labcorp asks you not to put private health information in that form, because submissions are stored on a third-party server. The same page warns that "email is not a secure method of communication" for receiving results.
Getting Results to Another Doctor
The Labcorp pages we read on 2026-11-13 don't describe a fax-to-doctor option for patients. Two routes work:
- Download or print your results from the patient portal, then fax the PDF to the new doctor's office yourself.
- Ask for copies through the routes in the records section above. The 2014 federal rule also lets you have copies sent to a person you choose.
If you hold a paper copy, scan it with the mFax camera scanner and send it from your phone. Our guide on how to fax medical records walks through the cover sheet and the receiving office's checks.
Can You Fax a Lab Order to Labcorp?
Labcorp's patient pages give no fax line for lab orders. Its patient FAQ describes two ways an order reaches Labcorp:
- Your doctor sends it electronically. "If your doctor has already sent it electronically, you typically won't need to bring a paper copy."
- You bring a paper test request form to your visit, with your insurance card and a photo ID.
Labcorp also takes a test request form from another laboratory. In that case you bring the form with you so Labcorp can verify the order with your provider. Labcorp says most orders are valid for one year from the day your provider writes them, and standing orders for up to six months.
Do Labcorp Patient Service Centers Have a Fax?
Yes, locally. Patient service center pages on locations.labcorp.com list a fax number for the location. We checked centers in North Carolina, California, Texas, New York and Florida on 2026-11-13, and every one listed its own fax.
What Labcorp doesn't say is what those local fax lines accept. None of the Labcorp pages we read on 2026-11-13 tells patients or providers to fax orders to a patient service center. Before you fax an order there, call the center and ask whether it takes orders by fax. If it does, use the fax on that location's page, not a number from a directory site.
For Ordering Offices: Labcorp Link and Local Labs
Labcorp routes ordering offices through Labcorp Link, its provider portal. Its provider FAQ covers three common requests:
| Provider request | Labcorp's answer |
|---|---|
| See your patients' result reports | Log in to Labcorp Link, formerly Labcorp Beacon |
| Get a result report resent | Contact your local laboratory |
| Add a test after the specimen was collected | Submit it in Labcorp Link, or call your local lab. After a verbal add-on, Labcorp sends a written authorization request and gives a fax number for returning it signed |
So the add-on fax number comes from Labcorp for that request; it isn't a public line. Return the signed authorization to the number Labcorp gave you, and keep the transmission receipt in the patient's chart. New practices can request a visit from a Labcorp representative through the provider contact page.
Labcorp results are only part of what a practice receives by fax. Referrals, records requests and results from other labs still arrive that way, as our guide to the Quest Diagnostics fax number shows for the other national lab.
How to Fax a Labcorp Form From Your Phone
Whichever Labcorp line you send to, the steps are the same. You need the file, the right number, and a few minutes.
Confirm the number
Use the number from the Labcorp page in the table above, from the location's page, or the one Labcorp gave you for your request.
Prepare the pages
Fill in and sign the form in the app's PDF editor, or scan a paper copy with the camera scanner in the iPhone, iPad or Android app. Word files and photos are converted to fax pages automatically.
Add a cover sheet
Pick a template, fill in the name, subject and message, and tick Confidential for a HIPAA confidentiality notice.
Send and keep the receipt
Press Send. One fax holds up to 60 pages and 100 MB, so the form and any proof of authority go together. When the row shows Delivered, choose Download receipt.
No app on the phone you're holding? The browser version works too; our guide to faxing from a phone without an app covers it.
Before You Fax Health Information to Labcorp
An EOB, a records request or an order carries your name, date of birth and details of your care. A few habits protect it:
- Check the number against the Labcorp page or your own paperwork, never a directory listing.
- Keep test details off the cover sheet. It's the first page anyone at the receiving machine sees. Our medical fax cover sheet guide shows what belongs there.
- Send everything in one fax so pages can't get separated on the other end.
- Keep the receipt. It shows that the receiving machine confirmed every page. Our guide to the fax confirmation page explains what it proves.
- Don't use web forms or plain email for health details. Labcorp warns against both on its own contact forms.
For Practices: A Fax Line With a Signed BAA
Labcorp orders may run through Labcorp Link, but practices still fax add-on authorizations, records requests, referrals and results from other labs. mFax Business gives your practice its own fax number, with HIPAA-compliant faxing and a signed BAA, on web, mobile and desktop. Every member signs in with their own login, and every fax gets a confirmed or failed status.
Plans start from about $9/mo, and you build your own plan from the seats and pages you need. Cancel anytime. Our guide to HIPAA-compliant fax explains what the BAA covers.
Send Your Labcorp Fax Today
For one form, such as an EOB for Labcorp billing, open the mFax app. Upload a PDF or snap a photo, and send it in under 2 minutes. Try it free for 7 days.
For a practice or office, mFax Business gives you the practice's own fax number, a signed BAA, API access and seats for the whole team across web, mobile and desktop. It starts from about $9/mo, and you build your own plan.