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 fastest — you'll pick your location, choose an available time slot, and confirm in minutes. Phone booking takes longer but lets you ask questions about what to bring or what the test involves.

Walk-in appointments are available at most Quest locations, though wait times vary by location and time of day. If you walk in, arrive early in the morning on a weekday for the shortest wait. You'll still need to bring your insurance card and photo ID, and you may need to complete paperwork on-site.

Key Takeaways

• Online scheduling at questdiagnostics.com is the fastest method and lets you see available times before you commit.
• You'll need your insurance information, a photo ID, and any lab order or requisition your doctor gave you.
• Most locations accept walk-ins, but scheduling ahead reduces your wait time.
• If you don't have an order from your doctor, Quest can sometimes order tests directly, but this varies by location and test type.
• Fasting requirements and other prep instructions depend on which test you're having — confirm these when you book.

What information you need before you book

Have your insurance card and photo ID ready when you schedule. If your doctor ordered the test, you'll also need the lab order or requisition — this is usually a paper form or an electronic order your doctor's office can send to Quest. You can often upload this during online booking or provide it when you arrive.

If you don't have a doctor's order, some Quest locations can order certain tests directly, but this depends on your state and the specific test. Call ahead or ask during online booking whether the test you need requires a doctor's order. Some tests — like drug screening for employment — have their own rules about who can order them.

Preparing for your specific test

Different tests require different preparation. Blood tests often require fasting (not eating or drinking anything but water for 8 to 12 hours before your appointment). Urinalysis usually has no prep. Pregnancy tests, drug screens, and other tests have their own rules. When you book, ask about prep for your specific test, or check the Quest website for the test name and "preparation" or "fasting requirements."

If you're fasting, schedule your appointment in the morning so you don't have to wait all day without eating. If you take medications, ask whether you should take them before your fasting test — some medications should be taken with food, and your doctor or the lab may have specific guidance. Write down any prep instructions and follow them exactly, because skipping prep can make your results invalid and require you to return for another test.

What happens when you arrive

Arrive 10 to 15 minutes early to allow time for check-in. Bring your insurance card, photo ID, and any lab order. At the front desk, you'll confirm your personal information, insurance, and the test you're having. If you booked online, this process is usually faster because your information is already in the system.

You'll then wait to be called back to the collection area. A phlebotomist (the person who draws blood) or technician will verify your identity again, explain what they're about to do, and perform the test. The whole process usually takes 5 to 15 minutes depending on the test. After the test, you can leave immediately — there's no recovery time for most routine tests.

Getting your results

Quest typically makes results available online through their patient portal within 24 to 48 hours, though some results take longer. You can create an account at questdiagnostics.com to view results, or your doctor's office may receive them and contact you. Some tests — like drug screens — may only be released to your employer or the organization that ordered them.

If you don't see your results within the timeframe Quest gave you, call the location where you had the test or contact customer service at 1-800-222-0446. Results that look abnormal should be discussed with your doctor, not interpreted on your own — your doctor can explain what the numbers mean in the context of your health.

If you need to reschedule or cancel

You can cancel or reschedule online through questdiagnostics.com if you booked online, or by calling 1-800-222-0446. If you cancel a fasting appointment, do so as soon as you know you can't make it, so someone else can use that time slot. If you're rescheduling a fasting test, book your new appointment for the morning of a day when you can actually fast.

If you miss your appointment without canceling, you may need to reschedule and go through the booking process again. Some locations charge a no-show fee, though this varies. If you're frequently unable to make appointments, consider scheduling at a location with extended hours or walk-in availability so you have more flexibility.

Frequently Asked Questions

Can I book an appointment if I don't have insurance?

Yes. Quest accepts uninsured patients and will bill you directly. Ask about the cost when you book, or request an estimate. Some locations offer discounts for uninsured patients who pay upfront. You'll still need a photo ID and, if applicable, a lab order from your doctor.

What if my doctor's order is old or from a different lab?

Quest can usually accept orders from any doctor or healthcare provider. If your order is more than a year old, call the location to confirm it's still valid — some tests expire. If your doctor ordered the test from a different lab, Quest can still run it as long as the order is clear about which tests you need.

Do I need an appointment, or can I just walk in?

Most Quest locations accept walk-ins without an appointment. However, scheduling ahead usually means a shorter wait, especially during busy times like early morning or lunch hours. If you have a complex test or need specific preparation, booking ahead also gives you time to ask questions.

What if I'm late to my appointment?

Call the location as soon as you know you'll be late. Many locations will still see you if you arrive within 15 to 30 minutes of your scheduled time, but they may ask you to reschedule if you're significantly delayed. If you're fasting, arriving late doesn't change your fasting status — you've still fasted, so the test is still valid.

Can someone else pick up my results or come with me to the appointment?

Yes, someone can come with you to your appointment. For results, Quest typically releases them only to the person who had the test or to their doctor. If you want someone else to receive your results, you can authorize them through the patient portal or by calling Quest directly.