How to Schedule an Appointment at Quest Diagnostics

How to book a Quest Diagnostics appointment

You can schedule a Quest Diagnostics appointment online, by phone, or by walking in without an appointment. The online method is fastest: go to questdiagnostics.com, enter your zip code to find the nearest location, select a date and time from the available slots, and confirm. You'll receive a confirmation email with your appointment details and a list of what to bring.

If you prefer to call, dial 1-866-QUEST-LAB (1-866-787-8352) and a representative will find an available time at your chosen location. Walk-in appointments are available at most Quest locations during their operating hours, though wait times vary by location and time of day — early morning visits typically have shorter waits.

Before you schedule, have your doctor's order or requisition form ready if your visit is for a test your doctor ordered. If you're paying out of pocket for a wellness screening or other self-ordered test, you can proceed without a doctor's order, though some tests do require one.

Key Takeaways

• Online scheduling at questdiagnostics.com is the fastest method and shows you real-time availability at your nearest location.
• You can call 1-866-QUEST-LAB to schedule by phone or ask about walk-in availability at a specific location.
• Bring a photo ID, insurance card (if you have one), and your doctor's order or requisition form if your test was ordered by a physician.
• Most Quest locations operate early morning through evening on weekdays and have limited Saturday hours; Sunday hours vary by location.
• If you're fasting for your test, schedule an early morning appointment to make fasting easier.

What documents to bring to your appointment

Bring a valid photo ID — a driver's license, passport, or state ID card. Quest will not process your visit without it. You'll also need your insurance card if you have health insurance, so Quest can bill your plan. If you don't have insurance, tell the staff when you arrive and they'll explain the out-of-pocket cost before drawing blood.

If your doctor ordered the test, bring the doctor's order or requisition form. This is a printed or digital document that lists which tests your doctor wants performed. If your doctor sent the order directly to Quest, you may not need to bring a physical copy — Quest can look it up by your name and date of birth — but bringing it avoids delays.

If you're scheduling a self-ordered test (a wellness screening you're paying for yourself), no doctor's order is needed, though some tests like certain hormone panels do require a physician's order by law. Quest's website will tell you during scheduling whether a test requires a doctor's order.

Preparing for your specific test

Different tests have different preparation rules. Fasting blood tests — usually for cholesterol, glucose, or metabolic panels — require you to eat and drink nothing except water for 8 to 12 hours before your appointment. Schedule these for early morning so fasting is easier. You can take most regular medications with water unless your doctor told you otherwise.

Non-fasting tests like a complete blood count (CBC) or thyroid test have no food or drink restrictions. You can eat normally before these appointments. If you're unsure whether your test requires fasting, call Quest at 1-866-QUEST-LAB the day before your appointment and confirm.

For urine tests, bring a clean container if Quest didn't provide one, though most locations have collection cups on hand. For drug screening tests, avoid certain foods (like poppy seeds) and over-the-counter medications that can cause false positives — Quest will give you a list when you schedule if your test is a drug screen.

If you're donating blood or plasma, wear loose, comfortable clothing that allows easy access to your upper arm, stay hydrated the day before, and eat a light meal a few hours before your appointment.

Timing and wait times at Quest locations

Most Quest Diagnostics locations are open Monday through Friday from 6:30 a.m. to 8 p.m., with Saturday hours typically 8 a.m. to 5 p.m. Sunday hours vary — some locations are open, others are closed. Check the hours for your specific location on questdiagnostics.com by entering your zip code.

If you have a scheduled appointment, you'll usually be seen within 15 to 30 minutes of your arrival time. Walk-in wait times depend on how busy the location is; early morning (before 10 a.m.) and mid-afternoon (after 2 p.m.) tend to be less crowded than lunch hours or late afternoon. During cold and flu season, wait times can stretch longer.

Actual blood draw or sample collection takes only a few minutes. Results typically come back within 24 to 48 hours for routine tests, though some specialized tests take longer. Quest will notify you by email or through your online account when results are ready.

Canceling or rescheduling your appointment

If you need to cancel or reschedule, do it online at questdiagnostics.com using your confirmation email, or call 1-866-QUEST-LAB. Canceling online is faster and you'll see new available times immediately. There's no penalty for canceling or rescheduling.

If you're rescheduling because you can't fast before your appointment, choose an earlier time slot — this gives you more time to prepare. If you're rescheduling because you're sick or have a fever, wait until you're well; some tests can be affected by acute illness, and Quest may ask you to reschedule anyway.

What happens if you arrive without an appointment

Walk-in appointments are available at most Quest locations during operating hours. When you arrive, check in at the front desk, bring your ID and insurance card, and let staff know whether you have a doctor's order or are paying out of pocket. They'll add you to the queue and give you an estimated wait time.

Walk-in waits are usually 30 minutes to an hour during busy times, though some locations with high traffic may have longer waits. If the wait is too long, you can schedule an appointment for a later time or another day and leave without being seen.

Understanding your test results

Results are delivered through your online Quest account, by email, or by mail, depending on how you set up your account. You can also call Quest to ask about results, though having them in writing is clearer. Results include a reference range — the normal values for that test — so you can see whether your result falls within normal limits.

If your result is abnormal, don't panic. Many abnormal results are minor or explained by medication, diet, or stress. Your doctor will review the results and contact you if action is needed. If you ordered the test yourself without a doctor, Quest's website usually has educational information about what the result means, but you may want to follow up with a doctor for interpretation.

Frequently Asked Questions

Can I schedule an appointment for someone else?

No. The person being tested must schedule their own appointment or be present when someone calls on their behalf. Quest needs to verify identity and confirm the person understands any fasting or preparation requirements. You can help a family member schedule online or by phone, but they must provide their own ID and insurance information at the appointment.

What if I forgot to fast and I have a fasting test scheduled?

Tell the staff when you check in. They may ask you to reschedule so the test is accurate, or they may draw blood anyway and note that you didn't fast — your doctor will see this note and can decide whether to repeat the test. It's better to reschedule than to have an inaccurate result.

Do I need a doctor's order for any test?

Most wellness screenings and routine tests can be ordered by you directly without a doctor. However, certain tests — like some hormone panels, genetic tests, or tests for specific conditions — require a doctor's order by law. Quest's website will tell you during scheduling whether a test requires an order.

How do I get my results if I don't have an online account?

You can create a free Quest account on questdiagnostics.com using your email and the information from your appointment confirmation. Results will be available there within 24 to 48 hours. You can also call Quest and ask for results by phone, though you'll need to verify your identity.

What if my insurance doesn't cover the test?

Quest will tell you the out-of-pocket cost before your appointment if your insurance won't cover it. You can choose to proceed and pay out of pocket, or reschedule and contact your doctor to see if a different test is covered. Quest also offers discounts for uninsured patients on many tests.