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. The online method is usually quickest — you pick your location, select an available time slot, and confirm in minutes. Phone scheduling takes longer because you'll wait for a representative, but it's useful if you have questions about what tests you need or which location is closest to you.

Walk-in appointments are available at most Quest locations during their posted hours, though wait times vary by location and time of day. If you walk in during a busy period — typically mid-morning or early afternoon on weekdays — you may wait 30 minutes to an hour. Early morning or late afternoon visits tend to have shorter waits.

Key Takeaways

• Online scheduling at questdiagnostics.com is the fastest method and lets you see real-time availability at your chosen location.
• You'll need your insurance card, photo ID, and any paperwork from your doctor's office that specifies which tests to run.
• Most locations are open early morning through evening on weekdays and have limited Saturday hours; Sunday hours are rare.
• If you don't have a doctor's order, you can still get certain tests done through Quest's walk-in wellness screening program, though costs are higher.
• Fasting requirements depend on the specific test — your appointment confirmation will tell you what to do beforehand.

What information you need before you book

Have your insurance card ready when you schedule. Quest will ask for your member ID and group number so they can verify coverage and tell you what your out-of-pocket cost will be. If you don't have insurance, Quest can still run tests, but you'll pay the full lab fee — prices vary by test type.

If your doctor ordered specific tests, have that paperwork or the doctor's name and phone number available. Quest can contact the doctor's office to pull the order, but it's faster if you bring the actual requisition form with you. If you're scheduling a test without a doctor's order — like a wellness screening or STI test — you can proceed without one, though Quest may ask screening questions about your health.

How to schedule online step by step

Go to questdiagnostics.com and look for "Schedule a Test" or "Find a Location" near the top of the page. Enter your zip code or city to see all Quest patient service centers near you, along with their hours and available appointment times. Click on the location you prefer.

Select your appointment date and time from the available slots shown on the calendar. The system shows you real-time openings, so if a time slot appears, it's actually available. Next, you'll enter your personal information: name, date of birth, phone number, and email address. Then you'll answer basic health questions — whether you're fasting, whether you're pregnant, any medications you take — so Quest knows how to prepare for your visit.

Review your insurance information and confirm your coverage. Quest will show you an estimated out-of-pocket cost based on your plan. Once you confirm, you'll receive a confirmation email with your appointment details, a barcode to bring or show on your phone, and any prep instructions specific to your test.

Scheduling by phone and what to expect

Call 1-800-222-0446 Monday through Friday, 7 a.m. to 7 p.m. Eastern time, or Saturday 8 a.m. to 4 p.m. Eastern time. Have your insurance card, zip code, and any doctor's order information ready. The representative will ask which location you prefer, what tests you need, and your availability. They'll book you into the next open slot that works for your schedule.

Phone representatives can also answer questions about fasting, what to bring, or whether your insurance covers a particular test. If you're unsure whether you need a doctor's order for what you want tested, they can tell you. After booking, you'll receive a confirmation email or text message with your appointment details and any prep instructions.

What to bring and how to prepare

Bring your photo ID and insurance card to every appointment. If you have a doctor's order, bring the original form or a copy — don't rely on Quest to retrieve it from the doctor's office on the day of your visit, because delays happen. If you're paying out of pocket, bring a payment method (credit card, debit card, or check).

Fasting requirements depend on your specific test. Blood work that measures cholesterol or glucose usually requires 8 to 12 hours of fasting — no food or drinks except water. Your appointment confirmation email will state whether fasting is required for your test. If you forget whether you're supposed to fast, call the location before you go; arriving fasted when it wasn't necessary wastes your time, but arriving unfasted when it was required means rescheduling.

Wear loose, comfortable clothing with sleeves that roll up easily if you're getting blood drawn. Arrive 10 to 15 minutes early to allow time for check-in paperwork, especially if it's your first visit to that location.

Rescheduling or canceling your appointment

You can reschedule or cancel online through your confirmation email — most confirmation messages include a link to manage your appointment. You can also call 1-800-222-0446 to reschedule. If you need to cancel, do it at least a few hours before your appointment time so the slot opens up for someone else.

If you miss an appointment without canceling, Quest may charge a no-show fee depending on your location and insurance plan. If you're running late, call the location directly to let them know — many will hold your slot if you're within 15 minutes of your appointment time.

Frequently Asked Questions

Do I need a doctor's order to get tested at Quest?

It depends on the test. Routine blood work and most diagnostic tests require a doctor's order. However, Quest offers wellness screenings and certain tests like STI panels without a doctor's order — you'll just pay more out of pocket. Ask when you schedule whether your specific test needs an order.

How long does a typical appointment take?

Most appointments last 15 to 30 minutes from check-in to leaving. Blood draws are usually quick, but if the location is busy or if you need multiple tests, it may take longer. Fasting blood work sometimes moves faster because fewer questions are needed.

Can I schedule an appointment for someone else?

Yes, you can schedule for a family member or dependent. You'll need their date of birth, insurance information if they have it, and their phone number or email for the confirmation. They'll need to bring their own ID and insurance card to the appointment.

What if my insurance doesn't cover the test my doctor ordered?

Quest will tell you the out-of-pocket cost during scheduling or at check-in. You can choose to pay out of pocket, ask your doctor if there's an alternative test your insurance covers, or contact your insurance company to ask about coverage before your appointment.

Are results available online after my appointment?

Yes. Quest provides online access to most results through their patient portal, usually within 24 to 48 hours of your test. You'll receive an email notification when results are ready. Your doctor's office also receives the results and may contact you if anything needs follow-up.