How to Schedule an Appointment at Quest Diagnostics

The fastest way to book a Quest Diagnostics appointment

You can schedule a Quest Diagnostics appointment online through their website, by phone, or by walking into a local center without an appointment. The online method is fastest — you pick your location, test type, and time slot in about two minutes. Their phone line (1-866-QUEST-01, or 1-866-787-8301) connects you to a representative who can also book same-day appointments if you call early in the morning.

Quest operates over 2,100 patient service centers across the United States, so most people have a location within a few miles. You do not need a doctor's order to schedule the appointment itself, though you will need one to have the test performed — Quest will ask you to bring it on the day you arrive, or your doctor can send it electronically before your visit.

Key Takeaways

• Online scheduling at questdiagnostics.com takes two to three minutes and shows real-time availability at your chosen location.
• You can call 1-866-787-8301 to book by phone, and representatives can often schedule same-day appointments if you call before 10 a.m.
• Walk-in appointments are accepted at most Quest centers during business hours, though wait times vary by location and time of day.
• You will need a doctor's order (prescription) to have any test performed, even if you scheduled the appointment without one.
• Bring a photo ID and insurance card on the day of your appointment, along with any paperwork your doctor sent to Quest in advance.

Scheduling online through Quest's website

Go to questdiagnostics.com and select "Schedule an Appointment" from the homepage. You will be asked to enter your zip code or city to find nearby centers. The site displays all locations within your search area, sorted by distance, along with their hours and whether they accept walk-ins.

Once you choose a location, the system shows available time slots for the next several days. Select your preferred date and time, then enter your name, date of birth, phone number, and email address. You will receive a confirmation email with your appointment details, a check-in code, and instructions on what to bring. Save this email or take a screenshot — you can show it on your phone when you arrive.

If you do not know which test your doctor ordered, you can search by test name (for example, "lipid panel" or "complete blood count") or call Quest before scheduling to confirm. The website also lets you upload documents, including your doctor's order, before your appointment date.

Booking by phone with a Quest representative

Call 1-866-787-8301 to speak with someone who can schedule your appointment and answer questions about what to bring or how to prepare. Representatives can often book same-day or next-day appointments, especially if you call before 10 a.m. on a weekday. Have your zip code and insurance information ready when you call.

The phone line is open Monday through Friday from 7 a.m. to 7 p.m. Eastern time, and Saturday from 8 a.m. to 4 p.m. Eastern time. If you call outside these hours, you can leave a message and a representative will return your call during business hours, or you can use the online scheduler instead.

Walking in without an appointment

Most Quest centers accept walk-in patients during their regular hours. You do not need to call ahead or schedule online. Bring your photo ID, insurance card, and your doctor's order. Check-in typically takes five to ten minutes, and wait times depend on how busy the center is — early morning visits (before 10 a.m.) usually have shorter waits than afternoon or evening hours.

If you walk in without a doctor's order, Quest staff can sometimes contact your doctor's office to request it electronically while you wait, though this may add 15 to 30 minutes to your visit. It is faster to have the order in hand when you arrive.

What to bring on the day of your appointment

Bring a valid photo ID (driver's license, passport, or state ID card) and your insurance card. If your doctor sent your order to Quest in advance, you do not need to bring a paper copy, but it does not hurt to have one. If you uploaded documents through the website during scheduling, Quest will have them on file.

Wear loose, comfortable clothing that allows straightforward access to your arm if you are having blood drawn. Some tests require fasting (not eating or drinking anything except water for 8 to 12 hours before the appointment), so check your confirmation email or call Quest to confirm whether your specific test has any preparation requirements.

Rescheduling or canceling an appointment

If you need to change your appointment time or date, log into your Quest account on their website and select "Manage Appointments," or call 1-866-787-8301. You can reschedule up to 24 hours before your appointment time. If you cancel within 24 hours of your appointment, some locations may charge a no-show fee, though this varies by center and insurance plan.

If you miss an appointment without canceling, Quest may mark you as a no-show in their system. This does not prevent you from scheduling future appointments, but it may affect how the center prioritizes your next visit.

Finding your nearest Quest location and hours

Use the location finder on questdiagnostics.com by entering your zip code or city name. The search results show each center's full address, phone number, hours of operation, and whether it accepts walk-ins. Some centers have extended hours (open until 8 or 9 p.m.) or weekend hours, which you can see in the location details.

If you have questions about a specific location's services — for example, whether they perform drug screening or allergy testing — call that center directly. The phone number appears in the location listing.

Frequently Asked Questions

Do I need a doctor's order to schedule an appointment?

No. You can schedule the appointment online or by phone without a doctor's order. However, you will need the order to have the test performed on the day of your visit. If you do not have it yet, ask your doctor to send it to Quest before your appointment, or bring it with you when you arrive.

Can I schedule an appointment for someone else?

Yes. When you schedule online or by phone, you can enter another person's name, date of birth, and contact information. That person will receive a confirmation email with the appointment details. They will need to bring their own photo ID and insurance card on the day of the appointment.

What if I do not have insurance?

Quest accepts uninsured patients. During scheduling or check-in, let them know you do not have insurance, and they will provide pricing information for your specific test. You can pay out-of-pocket at the time of service or ask about payment plans if the cost is high.

How long does a typical appointment take?

Most appointments take 15 to 30 minutes from check-in to completion, depending on the type of test and how busy the center is. Blood draws are usually the fastest. If you are having multiple tests or the center is crowded, allow extra time.

Can I get my test results online?

Yes. Quest provides online access to most test results through their patient portal, usually within 24 to 48 hours of your appointment. You can create an account on questdiagnostics.com or ask for login details at check-in. Your doctor also receives the results electronically.