How to Schedule an Appointment at Quest Diagnostics

The fastest way to book is online or by phone

You can schedule a Quest Diagnostics appointment through their website at questdiagnostics.com, by calling 1-800-222-0446, or by walking into a patient service center without an appointment. Online booking is usually quickest — you'll pick your location, choose an available time slot, and confirm in a few minutes. Phone booking takes longer but lets you ask questions about what to bring or how to prepare.

Walk-in appointments are available at most locations, though wait times vary by time of day and location. If you walk in, arrive early enough that the center can complete your visit before closing. Many people book ahead to avoid waiting, especially if they need fasting labs or have a specific test scheduled by their doctor.

Key Takeaways

• Book online at questdiagnostics.com, call 1-800-222-0446, or walk into any patient service center without an appointment.
• You will need your insurance card, photo ID, and any lab order from your doctor — bring all three to your appointment.
• If your doctor ordered the test, Quest can usually pull up the order using your name and date of birth, so you don't need a paper copy.
• Fasting labs require you to skip food and drink (except water) for 8 to 12 hours before your appointment, so schedule morning slots when possible.
• Most appointments take 15 to 30 minutes from check-in to blood draw, though results may take several days depending on the test.

What information you'll need to provide

When you book online or by phone, have your insurance information ready. Quest will ask for your date of birth, address, phone number, and insurance member ID. If your doctor ordered specific tests, you can tell Quest the test name or your doctor's name, and they can often look up the order in their system.

You don't need to have a paper lab order in hand to schedule — Quest can retrieve it electronically from your doctor's office. However, if you have the order, bring it with you. If you're paying out of pocket without insurance, Quest can quote you a price for common tests before your appointment.

Documents to bring on the day of your appointment

Bring a photo ID (driver's license, passport, or state ID card) and your insurance card. These are the two things Quest will ask for at check-in. If you have a printed lab order from your doctor, bring that too, though it's not required if Quest has already pulled up the order electronically.

If you're uninsured or paying out of pocket, bring a payment method — Quest accepts credit cards, debit cards, and cash. Ask about their cash discount when you check in; some locations offer a small reduction if you pay without insurance.

Preparing for common test types

If your test requires fasting, you'll need to skip food and all drinks except water for 8 to 12 hours before your appointment. Schedule a morning appointment whenever possible so the fasting window falls mostly overnight. When you book, Quest will tell you whether fasting is required for your specific test.

For routine blood work, wear loose, short-sleeved clothing so the phlebotomist can access your arm easily. Drink extra water the day before if you can — it makes veins easier to find. If you tend to feel faint during blood draws, let the staff know when you arrive; they can have you lie down or sit in a reclined chair.

For urine tests, you'll provide a sample in a private restroom at the center. For drug screening or certain other tests, Quest may have specific instructions about timing or what you can eat or drink beforehand — ask when you schedule.

What happens during your visit

Check in at the front desk with your ID and insurance card. The staff will verify your information, confirm which tests you're having, and ask whether you've fasted if required. You'll usually wait 5 to 15 minutes depending on how busy the center is.

A phlebotomist will call you back to a private or semi-private area, have you sit or lie down, and draw blood samples into labeled tubes. The whole process takes 5 to 10 minutes. You'll receive a bandage and can leave immediately. Some tests are done on-site; others are sent to a Quest lab and take a few days to a week for results.

How to get your results

Quest sends results to your doctor's office, and your doctor will contact you with the findings. You can also view many results yourself through the Quest patient portal at questdiagnostics.com — create an account when you schedule or after your visit. Results typically appear in the portal within 24 to 48 hours, though some specialized tests take longer.

If you need results urgently, call the Quest location where you had your test drawn and ask when they expect the results back. Some tests are marked as "stat" or rush, which means they're processed faster — ask your doctor or Quest whether that applies to you.

Rescheduling or canceling

If you need to reschedule, log into your account on questdiagnostics.com and change your appointment time, or call 1-800-222-0446. Most locations allow you to reschedule up to 24 hours before your appointment. If you cancel within 24 hours, you may lose any deposit or prepayment, depending on your location and insurance.

If you're sick or think you might have an infection, call ahead to reschedule rather than coming in. Quest may ask you to wait a few days for certain tests, or they may have a separate protocol for patients with symptoms.

Frequently Asked Questions

Can I schedule an appointment without a doctor's order?

Yes. Quest offers wellness screening packages and common tests like cholesterol panels and drug screens without a doctor's order. You'll pay out of pocket unless your insurance covers preventive screening. When you book, select "no doctor's order" and choose from the available test packages.

What if I don't know which test my doctor ordered?

Call your doctor's office and ask them to tell you the test name, or ask them to send the order to Quest. You can also give Quest your doctor's name and date of birth when you schedule, and they can search their system for any pending orders.

Do I have to fast before every blood test?

No. Fasting is required only for certain tests, most commonly lipid panels (cholesterol) and glucose tests. Quest will tell you during booking whether fasting is needed. If you're unsure, ask when you schedule or call the location before your appointment.

How long do results take?

Routine blood work usually takes 24 to 48 hours. Specialized tests, cultures, or genetic testing can take several days to a week or longer. Quest will give you an estimate when you schedule. You can check your patient portal or call the location to ask about your specific test.

What if I'm nervous about needles?

Tell the phlebotomist when you check in. They can have you lie down, look away during the draw, or sit in a reclined chair. Drinking extra water beforehand and taking slow, deep breaths during the draw also helps. Quest staff are used to nervous patients and will work with you.