How to Reschedule a Quest Diagnostics Appointment

The fastest way to reschedule is through your Quest account online or by phone

You can reschedule a Quest Diagnostics appointment through three main routes: your online Quest account, the Quest Diagnostics phone line, or in person at your local lab. The online method is usually fastest — you log in, find your appointment, and pick a new date and time in minutes. If you do not have an online account or prefer to speak with someone, calling Quest directly takes about 10 to 15 minutes once you reach a representative.

Quest Diagnostics operates thousands of patient service centers across the United States, and rescheduling policies are the same at all of them. You will need your appointment confirmation number or your date of birth to reschedule, whichever method you choose. If you are rescheduling because you forgot to fast or prepare for your test, you can usually move your appointment to the next available slot without penalty.

Key Takeaways

• Log into your Quest account at questdiagnostics.com, click "Manage Appointments," and select a new date and time without calling.
• Call 1-866-QUEST-99 (1-866-787-3899) to reschedule by phone; have your appointment confirmation number or date of birth ready.
• Walk into any Quest patient service center and ask to reschedule at the front desk if you are nearby and need to move your appointment the same day.
• Rescheduling more than 24 hours before your appointment usually has no fee, but canceling within 24 hours may result in a no-show charge depending on your insurance.
• If your doctor ordered the test, Quest may need to confirm the new appointment time with your provider's office, which can add one to two business days.

Rescheduling through your Quest online account

Go to questdiagnostics.com and sign in with your username and password. If you do not have an account, you can create one using your email address in about two minutes. Once you are logged in, look for a section labeled "Manage Appointments" or "My Appointments" — the exact wording varies slightly depending on whether you are on a computer or phone.

Click on the appointment you want to move. Quest will show you the current date, time, and location, along with what test or tests are scheduled. Select "Reschedule" or "Change Appointment." A calendar will appear showing available dates and times at your original location or at other nearby centers. Pick your new slot and confirm. You will receive an email confirmation within a few minutes, and your old appointment will be canceled automatically.

This method works only if your appointment was scheduled through Quest's website or through a doctor's office that uses Quest's online scheduling system. If your appointment was scheduled by phone or in person, you may not see it in your online account, and you will need to call instead.

Rescheduling by phone with Quest customer service

Call 1-866-QUEST-99 (1-866-787-3899) Monday through Friday, 7 a.m. to 7 p.m. Eastern time, or Saturday 8 a.m. to 4 p.m. Eastern time. Quest does not answer calls on Sunday. Have your appointment confirmation number ready — it appears on your appointment reminder email or text message. If you do not have the confirmation number, have your date of birth and the phone number or address associated with your account.

A representative will pull up your appointment, confirm the test type and your current date and time, and then show you available slots. You can choose a different location if you prefer, though this may add one to two business days if your doctor needs to approve the change. The representative will give you a new confirmation number and send a confirmation email or text to the phone number on file.

Wait times vary by time of day and day of week. Early morning (7 a.m. to 9 a.m.) and mid-afternoon (2 p.m. to 4 p.m.) typically have shorter waits than late morning or early afternoon. If you reach a busy signal, you can request a callback instead of waiting on hold.

Rescheduling in person at a Quest location

Walk into any Quest Diagnostics patient service center and tell the front desk staff you need to reschedule an appointment. Bring your appointment confirmation email or text, or be ready to provide your date of birth. The staff member will look up your appointment and show you available times on their computer screen.

This method works best if you are already at or near a Quest location, or if you need to reschedule the same day. If you are moving your appointment to a different location, the staff member will confirm that the new center offers your test type — not all locations run all tests. You will receive a new confirmation number on the spot and an email confirmation within a few hours.

What happens if you reschedule within 24 hours

Rescheduling more than 24 hours before your appointment is free and has no impact on your insurance or your doctor's records. If you reschedule within 24 hours of your appointment time, Quest may charge a no-show fee, though the amount and whether it applies depends on your insurance plan and whether your doctor ordered the test.

Some insurance plans cover the no-show fee; others do not. If you are unsure, call your insurance company before you reschedule. If your doctor ordered the test, Quest may need to send the new appointment time to your provider's office for approval, which can delay confirmation by one to two business days. Call Quest to ask whether your test requires provider approval before you reschedule.

Rescheduling when your doctor ordered the test

If your appointment was ordered by your doctor or a clinic, Quest may need to notify your provider's office of the new date and time. This is especially true for tests that require fasting, specific preparation, or follow-up results. When you reschedule through your online account or by phone, Quest will tell you whether provider approval is needed.

If approval is required, Quest will send the new appointment details to your doctor's office electronically. This usually takes one to two business days. Your doctor's office will confirm the new time, and you will receive a final confirmation email or text. If you do not hear back within two business days, call your doctor's office to confirm they received the reschedule request.

Do not assume your appointment is confirmed just because you rescheduled it online. If your test requires provider approval and you do not receive a final confirmation within two business days, call Quest again to check the status.

Common reasons rescheduling gets delayed

The most common delay is when your doctor's office does not confirm the new appointment time within the expected window. This happens when the office is busy or when the reschedule request gets lost in their system. If you do not hear back within two business days, call your doctor's office directly and ask them to confirm the new appointment with Quest.

Another delay occurs when you try to reschedule to a location that does not offer your test type. Quest's online system usually prevents this, but if you reschedule by phone, the representative should tell you whether the new location can run your test. If it cannot, you will need to pick a different location or reschedule at your original center.

Rescheduling during a holiday week or when Quest's system is down can also add time. If you reschedule and do not receive confirmation within four hours, call Quest to confirm the reschedule went through.

Frequently Asked Questions

Can I reschedule my appointment the same day?

Yes, if you call Quest or walk into a location in person. Online rescheduling may not show same-day slots depending on how far in advance the appointment was booked. Call 1-866-787-3899 to reschedule the same day, or go to your nearest Quest center and ask at the front desk.

What if I need to cancel instead of reschedule?

Canceling more than 24 hours before your appointment is free. To cancel, use the same method you would use to reschedule — your online account, the phone line, or in person — and select "Cancel" instead of "Reschedule." If you cancel within 24 hours, a no-show fee may explore depending on your insurance.

Do I need to tell my doctor if I reschedule?

Quest will notify your doctor's office automatically if your test requires provider approval. If your test does not require approval, you do not need to tell your doctor — Quest will have the new appointment time on file. If you are unsure whether your test requires approval, call Quest at 1-866-787-3899.

What if I forgot my confirmation number?

You can reschedule without it. Have your date of birth and the phone number or address on your account ready. If you are rescheduling online, log into your account and your appointments will appear automatically. If you are calling, the representative can look up your appointment using your date of birth.

Can I reschedule to a different Quest location?

Yes. When you reschedule online or by phone, you can choose a different location if it is available and offers your test type. Some tests are only available at certain centers, so Quest will tell you which locations can run your test. Rescheduling to a different location may add one to two business days if your doctor needs to approve the change.