What Quest Diagnostics Does
Quest Diagnostics is a clinical laboratory company that processes blood tests, drug screens, and other diagnostic tests ordered by doctors, employers, and individuals. When your doctor orders lab work, Quest is often the company that actually runs the test and sends results back. You do not need to be a Quest customer — your doctor or employer sends your sample there, and Quest handles the rest.
Quest operates thousands of patient service centers across the United States where you go to have blood drawn or provide a sample. These are separate from hospitals and doctor's offices, though your doctor's office may also draw blood on-site. If your doctor orders a test "at Quest" or gives you a Quest requisition form, it means you will visit a Quest location for the sample collection.
The company also offers direct-to-consumer testing, meaning you can order certain tests yourself without a doctor's order, pay out of pocket, and get results online. This is different from insurance-covered tests ordered by a physician.
Key Takeaways
- Quest Diagnostics runs lab tests ordered by your doctor, employer, or ordered directly by you, and operates thousands of patient service centers where samples are collected.
- You can find your nearest Quest location, check wait times, and schedule an appointment through their website or by phone without needing to call your doctor's office.
- Bring your insurance card and photo ID to your appointment; if you do not have insurance, Quest offers self-pay pricing that you can ask about before your visit.
- Results are typically available within one to three business days and are sent to your doctor and to your online account if you have one.
- Quest also performs drug screening, background check testing, and wellness testing for employers and can be used by individuals ordering tests directly.
How to Find a Quest Location and Schedule
Quest Diagnostics has a location finder on their website at questdiagnostics.com. Enter your zip code or city, and the site shows nearby patient service centers with their hours and current wait times. Many locations do not require an appointment — you can walk in during business hours — but you can also schedule online or by phone to skip the waiting room.
To schedule an appointment, you will need the test requisition form from your doctor or employer, or you can order a test directly through Quest's website if you are paying out of pocket. When you book, Quest asks for basic information: your name, date of birth, insurance details if you have them, and which test you need. If you do not have a requisition form yet, call the location and ask whether you can come in with just your doctor's name and the test name.
Walk-in hours vary by location. Some centers are open early morning through evening on weekdays and have limited weekend hours. Check the specific location's hours before you go, especially if you need to visit on a Saturday or Sunday.
What to Bring and What Happens During Your Visit
Bring your photo ID and insurance card. If you have a paper requisition form from your doctor, bring that too — it tells Quest which tests to run. If you scheduled online or your doctor sent the order electronically, Quest will have it on file, but having the form is a backup.
When you arrive, check in at the front desk. You will fill out a brief form with your contact information and medical history if it is your first visit. A phlebotomist (the person who draws blood) will call you back, verify your name and date of birth, and explain what test is being done. For most blood tests, they tie a band around your upper arm, insert a needle into a vein, and collect blood into one or more tubes. The whole process takes a few minutes.
If you are fasting (not eating or drinking anything but water before the test), tell the phlebotomist. Some tests require fasting, and your doctor will have told you this when ordering. If you forgot to fast and the test requires it, let the staff know — they may reschedule you or note it on your results.
Understanding Test Results and How You Get Them
Results are usually ready within one to three business days, though some tests take longer. Your doctor receives the results electronically, and you can also view them through an online patient portal if you create an account on the Quest website. To set up a portal account, you will need your date of birth and the phone number or email on file from your visit.
Results show the test value and a reference range — the normal range for that test. If your result falls within the range, it is typically normal. If it is outside the range, it may indicate a health issue, but only your doctor can interpret what it means for you. Quest provides the numbers; your doctor explains what they mean and what to do next.
If you ordered a test directly through Quest without a doctor's order, you still get results online, but you will not have a doctor to discuss them with. Some people use direct-to-consumer results to share with their doctor at a later appointment, or to monitor their own health trends over time.
Costs and Insurance Coverage
If your doctor ordered the test and you have insurance, Quest bills your insurance company. You may owe a copay at the time of your visit, or you may receive a bill later depending on your plan. Ask the front desk staff what your out-of-pocket cost will be before your appointment if you want to know in advance.
If you do not have insurance or your insurance does not cover the test, you can pay out of pocket. Quest publishes self-pay prices on their website for many common tests. Prices vary by test and by location. You can call ahead and ask what a specific test costs, or ask at check-in.
Some employers and schools use Quest for drug screening or background check testing. In those cases, your employer or school pays Quest directly, and you do not pay anything.
Direct-to-Consumer Testing Through Quest
Quest offers tests you can order yourself without a doctor's order through their website. These include wellness panels, vitamin level checks, STI testing, and other screenings. You order online, pay the listed price, go to a patient service center to provide your sample, and receive results in your online account.
Direct-to-consumer tests are useful if you want to check your health between doctor visits or if you do not have a doctor. However, the results are yours to interpret — Quest does not provide medical information. If you find an abnormal result, you should discuss it with a doctor before taking any action.
Prices for direct-to-consumer tests are typically lower than what insurance would be billed, but higher than a copay. Compare the price on Quest's website before ordering to make sure it fits your budget.
What to Do If You Have Questions or Problems
If you have questions about a test before your visit, call the patient service center directly. The phone number is on the location finder page. Staff can tell you whether you need to fast, what to bring, and how long results take.
If you have questions about your results after you receive them, contact your doctor — Quest provides the numbers, but your doctor interprets them. If you ordered a direct-to-consumer test and have questions about the results, you can call Quest's customer service, but they will not provide medical information.
If you believe there was an error in your test or your results, contact Quest directly with your test order number. You can find this on your receipt or in your online account. Quest can review what happened and may offer to retest if there was a collection error.
Frequently Asked Questions
Do I need an appointment or can I just walk in?
Most Quest locations accept walk-ins during business hours, but wait times vary. You can check the current wait time on the website or call ahead. Scheduling an appointment online or by phone usually gets you in faster and lets you skip the waiting room.
What if I do not have insurance?
You can still get tested at Quest. Ask about self-pay pricing at check-in or call the location ahead of time. Prices are posted on the website for many common tests. Some community health centers or free clinics also offer lab testing if cost is a barrier.
How long does it take to get results?
Most results are ready within one to three business days. Some specialized tests take longer — Quest will tell you the expected timeline when you schedule or check in. Your doctor receives results electronically, and you can view them in your online account.
Can I order a test without my doctor?
Yes. Quest offers direct-to-consumer testing where you order online, pay out of pocket, and get results in your account. You do not need a doctor's order. However, only your doctor can interpret results and advise you on what to do next.
What if my test result is abnormal?
Contact your doctor to discuss the result. If you ordered a direct-to-consumer test without a doctor, you should schedule an appointment with a doctor to talk about what the result means and whether you need follow-up testing or treatment.