How to Schedule a Quest Diagnostics Appointment Online

You can book most Quest Diagnostics appointments through their website or mobile app without calling

Quest Diagnostics lets you schedule lab work online at questdiagnostics.com or through their mobile app. You'll need your doctor's order (the lab requisition), your insurance card, and a few minutes to complete the booking. The process is straightforward: you pick a location, choose a date and time, confirm your insurance, and you're done. Some appointment types — like drug screening or occupational health exams — may require a phone call instead, but routine blood work, urinalysis, and most other tests can be booked entirely online.

The online system shows you real-time availability at Quest locations near you, so you can often find an appointment within a day or two. You'll receive a confirmation email with your appointment details, a barcode, and any prep instructions specific to your test. If you need to reschedule or cancel, you can do that online as well.

Key Takeaways

• Visit questdiagnostics.com or use the Quest Diagnostics mobile app to book most routine lab appointments without calling.
• You will need your doctor's lab order, insurance information, and a valid ID on the day of your appointment.
• The online system shows available time slots at nearby locations, and you receive a confirmation email with your barcode and any fasting or prep requirements.
• Some tests — like drug screening or employer-ordered exams — may require scheduling by phone instead of online.
• You can reschedule or cancel your appointment through the same website or app if your plans change.

What you need before you start booking online

Have your doctor's lab requisition ready before you begin. This is the order your doctor sent to Quest that lists which tests you need. If you don't have it in hand, you can sometimes search for it in the online system using your name and date of birth, but it's faster if you have the actual document or know the test names.

You'll also need your insurance card (front and back) and a valid photo ID. If you're uninsured or paying out of pocket, Quest will show you the cost before you confirm the appointment. Have your phone number and email address ready too — Quest uses these to send you reminders and your confirmation.

Step-by-step: booking on the Quest website

Go to questdiagnostics.com and look for the "Schedule an Appointment" button, usually on the homepage. Click it and you'll be asked whether you have an existing Quest account. If you do, log in; if not, you can create one or continue as a guest. Creating an account takes about two minutes and lets you see past results and reschedule future appointments more easily.

Next, enter your zip code or city to find nearby Quest locations. The system will show you which locations have openings and how far each one is from you. Select the location that works best for your schedule. Then choose your preferred date and time from the available slots — most locations offer early morning, afternoon, and evening appointments on weekdays and some weekend hours.

You'll then enter or confirm your insurance information. If you have multiple insurance plans, make sure you're using the right one. Quest will tell you your out-of-pocket cost at this point if you have a copay or deductible. Review the test name and any prep instructions (like fasting), then confirm your appointment. You'll get a confirmation number and an email with your barcode and appointment details.

Using the Quest Diagnostics mobile app

The Quest Diagnostics app works the same way as the website and is available on iOS and Android. Download it, log in or create an account, and tap "Schedule an Appointment." The app shows your location automatically (if you allow it) and can be slightly faster than the website on a phone. You can also use the app to check in when you arrive at the location, which can save a few minutes at the front desk.

The app also stores your confirmation barcode, so you don't have to print anything or show an email — just pull up the barcode on your phone when you check in. If you receive appointment reminders, you can manage those through the app settings.

What happens if your test requires fasting or other prep

Some tests — like fasting glucose or lipid panels — require you to fast (usually for 8 to 12 hours before the appointment) or avoid certain foods or medications. Quest will show you these instructions during booking and will email them to you again in your confirmation. Read them carefully and follow them exactly, because not following prep instructions can make your results invalid and require you to come back.

If you're unsure whether you need to fast or prepare in a specific way, call the Quest location directly before your appointment. The phone number is on your confirmation email. It's better to ask than to show up unprepared and have to reschedule.

When you can't book online and need to call instead

Drug screening tests, DOT (Department of Transportation) physicals, and some employer-ordered exams usually can't be booked online because they have specific rules about chain of custody or witness requirements. If you try to book one of these tests online and the system won't let you, you'll need to call Quest directly. The number is on their website, and wait times are usually shortest early in the morning or late afternoon.

Some locations also have phone-only hours for certain types of appointments. If the online system doesn't show availability for what you need, a phone call can sometimes reveal options that aren't listed online.

Rescheduling or canceling your appointment

If your plans change, log into your Quest account on the website or app and find your upcoming appointment under "My Appointments." You can reschedule to a different date or time, or cancel entirely. If you cancel, Quest will send you a confirmation email. If you reschedule, you'll get a new confirmation with updated details.

If you need to cancel or reschedule and can't do it online for some reason, call the location directly. Most locations ask for at least a few hours' notice, though canceling the day of is usually possible — it just helps them fill the slot for someone else.

Frequently Asked Questions

Do I need to create a Quest account to book an appointment online?

No. You can book as a guest without creating an account. However, creating an account (which takes about two minutes) makes it easier to reschedule, view past results, and manage future appointments. You can create one anytime.

What if my doctor's order isn't showing up in the system?

Call the Quest location where you want to go, or contact your doctor's office to confirm they sent the order to Quest. Sometimes there's a delay of a few hours between when your doctor sends it and when it appears in Quest's system. Your doctor may also need to send it to a specific Quest location rather than Quest in general.

Can I book an appointment for someone else?

You can book for a family member or dependent if you have their information and their doctor's order. During booking, you'll enter their name, date of birth, and insurance. They'll need to bring their ID and insurance card to the appointment.

What if I show up late to my appointment?

Call the location as soon as you realize you'll be late. Most locations will still see you if you arrive within 15 to 30 minutes of your scheduled time, but it depends on how busy they are. If you're going to be more than 30 minutes late, ask whether you should reschedule instead.

Can I change my appointment time the day before or day of?

Yes, you can reschedule through the website or app anytime before your appointment. If the system isn't showing available slots, call the location directly — they may have cancellations that don't appear online immediately.