How to Cancel a Quest Diagnostics Appointment

You can cancel a Quest Diagnostics appointment online, by phone, or in person — the fastest way depends on how soon you need it cancelled

Quest Diagnostics lets you cancel through their patient portal, by calling the location directly, or by walking in and asking staff to remove you from the schedule. Online cancellation through your Quest account takes a few minutes and works if you have at least a few hours before your appointment. Calling the lab location gives you when ready confirmation and works closer to your appointment time. If you are already at the lab, staff can cancel on the spot.

The reason you cancel matters less than the timing — Quest does not charge cancellation fees, but if you do not show up without cancelling, the lab may flag your account and you could face delays scheduling future tests. Cancelling properly keeps your account in good standing and makes it easier to book again when you need to.

Key Takeaways

• Quest Diagnostics has no cancellation fee, and you can cancel online through your patient portal, by phone to your lab location, or in person at the lab.
• Online cancellation through the Quest patient portal works if you have several hours before your appointment, while calling the lab location works closer to your appointment time.
• Not showing up without cancelling may result in your account being flagged, which can delay future appointment bookings.
• You will need your appointment confirmation number or date of birth to cancel by phone.

Cancelling through the Quest patient portal online

Log into your Quest Diagnostics patient account on the Quest website or mobile app. Go to "My Appointments" or "Upcoming Appointments" — the exact label depends on which device or app version you are using. Find the appointment you want to cancel and select the "Cancel Appointment" button next to it.

The system will ask you to confirm the cancellation. Once you confirm, you will see a message saying the cancellation is complete. Quest will send you a confirmation email to the address on file. This process usually takes less than five minutes. If you do not have a Quest patient account yet, you can create one on their website using your email and a password, then link it to your appointment using your date of birth or confirmation number.

Online cancellation works best if your appointment is at least a few hours away. If your appointment is in the next hour or two, calling the lab location directly is faster because the staff can remove you from the schedule when ready.

Cancelling by phone

Call the Quest Diagnostics location where you have your appointment scheduled. You can find the phone number by searching "Quest Diagnostics near me" on Google Maps, visiting the Quest website and using their location finder, or checking your appointment confirmation email — it usually lists the lab's phone number. Have your appointment confirmation number or date of birth ready when you call.

Tell the staff member you want to cancel your appointment and provide your name and appointment date or time. They will remove you from the schedule and may ask if you want to reschedule. The call usually takes two to three minutes. This method works at any time, including close to your appointment, and gives you when ready confirmation that you are off the schedule.

If you call and reach a voicemail, leave your name, date of birth, and appointment date and time. Staff will call you back to confirm the cancellation, usually within a few hours during business hours. Do not rely on voicemail if your appointment is within the next few hours — try calling back or visiting in person instead.

Cancelling in person at the lab

Walk into the Quest Diagnostics location where your appointment is scheduled and tell the front desk staff you want to cancel. Bring your appointment confirmation email or confirmation number if you have it, though staff can also look up your appointment using your name and date of birth. They will remove you from the schedule on the spot.

This method works if you are already at the lab or nearby, or if your appointment is very soon and you want to cancel face-to-face. The staff will give you verbal confirmation, and you may receive a cancellation email afterward.

What happens if you do not cancel

If you do not show up for your appointment and do not cancel beforehand, Quest may flag your account as a no-show. This does not result in a fee, but it can make it harder to schedule future appointments — some labs may require you to call ahead and confirm before they hold a slot for you, or they may ask you to reschedule multiple times before they trust that you will arrive.

Cancelling properly, even at the last minute, keeps your account in good standing and makes the booking process smoother next time. If you know you cannot make it, cancel as soon as you realize it.

Rescheduling instead of cancelling

If you want to move your appointment to a different time or date rather than cancel it entirely, you can reschedule through the same methods. In the Quest patient portal, select your appointment and choose "Reschedule" instead of "Cancel." By phone, tell the staff member you want to move your appointment, and they will help you find a new time. In person, ask the front desk to reschedule you.

Rescheduling is often faster than cancelling and then booking a new appointment separately, because the lab can move you to an open slot without you having to search the calendar yourself.

If you have trouble cancelling

If the online portal is not working, try logging out and logging back in, or use the Quest mobile app instead of the website. If you still cannot cancel online, call the lab location directly — this is always an option. If you call and cannot reach anyone, try calling during business hours (usually 6 a.m. to 6 p.m. on weekdays, with shorter hours on weekends) or visit the lab in person.

If your appointment is with a specific doctor's office that uses Quest for lab work, you can also call the doctor's office and ask them to cancel the lab order. This removes the appointment from Quest's system and prevents any confusion about whether you are still scheduled.

Frequently Asked Questions

Do I have to pay a fee to cancel my Quest appointment?

No. Quest Diagnostics does not charge cancellation fees. You can cancel at any time without penalty. However, repeatedly not showing up without cancelling may affect how easily you can book future appointments.

How long before my appointment do I need to cancel?

There is no minimum time. You can cancel online, by phone, or in person at any point — even a few minutes before your appointment. Cancelling closer to your appointment time is best done by phone or in person so staff can remove you from the schedule when ready.

Will cancelling affect my doctor's order for lab work?

Cancelling your appointment does not cancel the lab order itself. Your doctor's order stays active, so you can reschedule the same test whenever you are ready. If you want the order cancelled entirely, contact your doctor's office and ask them to cancel it.

What if I cancel but then need the test done urgently?

You can reschedule a new appointment through the portal, by phone, or in person. Quest often has same-day or next-day appointments available at many locations. Call your lab location to ask about urgent openings, or check the online scheduler to see what times are available.

Can I cancel someone else's appointment?

You can cancel an appointment for a dependent child or family member if you have access to their Quest patient account or if you call the lab with their name and date of birth. For privacy reasons, Quest may ask you to verify your relationship to the person whose appointment you are cancelling.