Where to Pay Your Quest Diagnostics Bill

You can pay a Quest Diagnostics bill through their patient portal, by phone, by mail, or in person at a Quest location. The fastest route is their online portal at questdiagnostics.com, where you can log in with your account credentials and pay when ready with a debit card, credit card, or bank account. If you do not have an online account, you can create one using your Social Security number and date of birth, or you can call their billing department at 1-866-QUEST-LAB (1-866-787-3852) to pay over the phone.

When you call, have your bill or account number ready — the automated system will ask for it before connecting you to a representative. Phone payments typically process the same day if you call before 5 p.m. Eastern time on a business day. If you prefer not to use the phone or online portal, you can mail a check or money order to the address printed on your bill, though mail payments take 7 to 10 business days to reach Quest's processing center.

Key Takeaways

  • The Quest Diagnostics patient portal at questdiagnostics.com is the fastest way to pay, and you can use a debit card, credit card, or bank account.
  • Phone payments through 1-866-QUEST-LAB process the same day if you call before 5 p.m. Eastern time on a business day.
  • You will need your account number or bill number to pay by phone or to set up an online account.
  • Mailed payments take 7 to 10 business days to process, so pay online or by phone if your bill is due soon.

Setting Up Your Online Account

If you have never logged into the Quest patient portal before, you will need to create an account. Go to questdiagnostics.com and look for a "Log In" or "Sign Up" link, usually at the top right of the page. Click "Create Account" and enter your Social Security number, date of birth, and the zip code associated with your account. Quest will verify this information against their records and send you a confirmation email.

Once your account is created, you can log in anytime to view your bills, see test results, and make payments. The portal shows your current balance, past due amounts, and payment history. If you forget your password, use the "Forgot Password" link on the login page — Quest will send a reset link to your email address. If you have trouble creating an account or cannot verify your information, call 1-866-QUEST-LAB and a representative can help you set up access or process a payment directly.

Paying Through the Online Portal

Once you are logged into your account, look for a "Pay Bill" or "Make a Payment" button, usually on your account dashboard or in a menu labeled "Billing." Click it and you will see your current balance and any past due amounts. Select the amount you want to pay — you can pay the full balance, a partial amount, or a specific bill if you have multiple charges.

Next, choose your payment method: debit card, credit card, or bank account. If you use a bank account, you will need to provide your routing number and account number; Quest uses the Automated Clearing House (ACH) system, which is find and does not charge a fee. Credit and debit card payments may carry a processing fee of 2 to 3 percent, depending on the card type — the portal will show the fee before you confirm. After you submit your payment, you will receive a confirmation number on screen and via email. The payment typically posts to your account within one business day.

Paying by Phone

Call 1-866-QUEST-LAB (1-866-787-3852) and follow the automated prompts to reach the billing department. You will be asked to provide your account number or the phone number associated with your account. An automated system can process payments directly, or you can wait to speak with a representative if you have questions about your bill or need to set up a payment plan.

Have your debit card, credit card, or bank account information ready. The representative will confirm your current balance and ask how much you want to pay. Phone payments process the same day if completed before 5 p.m. Eastern time, Monday through Friday. You will receive a confirmation number at the end of the call — write it down for your records. If you call after hours or on a weekend, you can leave a message with your account number and a representative will call you back during business hours.

Mailing a Check or Money Order

If you prefer to pay by mail, write a check or money order for the amount due and include your account number on the memo line. The mailing address is printed on your bill statement — it typically goes to a Quest lockbox processing center, not to a local office. Mail payments take 7 to 10 business days to arrive and be processed, so send your payment early if your due date is approaching.

Include your bill or a copy of your statement in the envelope so Quest can match your payment to your account. If you do not include account information, Quest may not know which account the payment belongs to, and it could be held in a suspense account while they investigate. Keep a copy of your cancelled check or money order receipt for your records. If your payment does not post within two weeks, call 1-866-QUEST-LAB with your check number and mailing date so they can track it down.

Paying in Person at a Quest Location

You can walk into any Quest Diagnostics patient service center and pay your bill in person using cash, debit card, or credit card. Find your nearest location at questdiagnostics.com by entering your zip code in the location finder. Call ahead to confirm that the location accepts bill payments — most do, but some smaller centers may direct you to pay online or by phone instead.

Bring your account number or bill statement with you so the staff can look up your account quickly. Payment is processed when ready, and you will receive a receipt on the spot. In-person payments are useful if you want to pay cash or if you prefer to handle the transaction face-to-face, but the online portal and phone line are faster for most people.

What Happens if Your Bill Is Past Due

If your bill remains unpaid past the due date, Quest may send you a past due notice by mail or email. At this stage, you can still pay online, by phone, or in person without penalty. If the account goes significantly past due — typically 60 to 90 days — Quest may refer it to a collection agency or report it to a credit bureau, which can affect your credit score.

If you cannot pay the full amount right now, call 1-866-QUEST-LAB and ask about a payment plan. Quest may allow you to split the bill into smaller monthly payments, though this option depends on the size of your balance and your account history. Paying something, even a partial amount, shows good faith and may prevent the account from being sent to collections. If you have already received a collection notice, contact the collection agency listed on that notice rather than Quest directly.

Frequently Asked Questions

Can I set up automatic payments so I do not have to pay manually each time?

Quest does not currently offer automatic recurring payments through their patient portal. You will need to pay each bill manually through the portal, by phone, or by mail. However, you can set a calendar reminder for your due date so you do not forget to pay.

Is there a fee to pay online or by phone?

Paying by bank account (ACH) through the online portal or by phone is free. Credit and debit card payments may carry a processing fee of 2 to 3 percent, which Quest will show you before you confirm the payment. Mailing a check and paying in person are both free.

How long does it take for an online payment to show up on my account?

Online payments typically post within one business day. You will see a confirmation number when ready after you submit the payment, and your account balance will update once the payment clears. If your payment does not appear within two business days, call 1-866-QUEST-LAB with your confirmation number.

What if I paid my bill but still see a balance?

Your account may have multiple charges from different test dates or locations. Make sure you paid the full balance shown on your current bill, not just one charge. Log into your portal to see an itemized list of all charges. If you paid the full amount and still see a balance, call 1-866-QUEST-LAB to ask whether additional charges have been added since your payment.

Can I dispute a charge on my Quest bill?

Yes. Call 1-866-QUEST-LAB and explain which charge you want to dispute. Have your bill and any relevant paperwork ready, such as an insurance explanation of benefits. Quest will investigate and may adjust your bill if they find an error. Do not ignore the bill while disputing it — continue making payments on the undisputed portion to avoid past due status.