How to Schedule and Prepare for a LabCorp Blood Test

What to expect when you book a LabCorp blood test appointment

A LabCorp blood test appointment is a visit to one of LabCorp's patient service centers where a phlebotomist draws blood for lab analysis. You can schedule online through LabCorp's website, by phone, or by walking in without an appointment — most locations accept walk-ins during their posted hours. When you arrive, you'll check in, provide your insurance card and ID, and then wait to be called back to the draw station. The actual blood draw takes just a few minutes.

LabCorp operates thousands of patient service centers across the United States, so you likely have one near you. The company handles blood tests ordered by your doctor, tests you order yourself through their online portal, and tests required by employers or insurance companies. Knowing which type of test you're having and whether your doctor has already sent the order makes the appointment smoother.

Key Takeaways

• You can schedule a LabCorp blood test online, by phone, or by walking in without an appointment at most locations.
• Bring your insurance card, photo ID, and any paperwork your doctor gave you, including the test order if you have it.
• Some tests require fasting (no food or drink except water for 8 to 12 hours before), so ask when you schedule whether yours does.
• Results typically arrive within 24 to 48 hours and are sent to your doctor or available through your LabCorp online account.
• If you don't have an order from your doctor, you can order tests yourself through LabCorp's website, though your insurance may not cover the cost.

How to schedule your appointment online or by phone

The fastest way to schedule is through LabCorp's website at labcorp.com. Click "Schedule a Test" and enter your zip code to find nearby locations. You'll see available appointment times for the next several days, and you can book a specific time slot. If you prefer to speak with someone, call 1-800-LAB-CORP (1-800-522-2677) and a representative will find a location near you and book your appointment.

When you schedule, have your insurance information ready if you have it. If your doctor has already ordered a test, you can provide that order number during scheduling, which speeds up check-in. If you're ordering a test yourself without a doctor's order, LabCorp will ask which test you want and will let you know the cost before you confirm.

Walk-in appointments are available at most LabCorp locations during their regular hours, which are typically Monday through Friday 7 a.m. to 7 p.m. and Saturday 8 a.m. to 4 p.m., though hours vary by location. If you walk in, expect a slightly longer wait than if you had scheduled ahead, but you won't need an appointment.

What documents and information to bring

Bring your photo ID and your current insurance card. If your doctor ordered the test, bring the order paperwork or the order number — you can also ask your doctor's office to send it directly to LabCorp before your appointment. If you don't have the order with you, LabCorp can contact your doctor's office to retrieve it, but this may delay your visit.

If you're having a test ordered through your employer or insurance company (such as a required physical exam), bring any paperwork they gave you. Write down any medications you're currently taking, as some can affect test results. You don't need to bring anything else — LabCorp provides the collection supplies.

Fasting and other preparation requirements

Some blood tests require fasting, meaning you cannot eat or drink anything except water for 8 to 12 hours before your appointment. Common tests that require fasting include lipid panels (cholesterol and triglycerides), glucose tests, and metabolic panels. Ask when you schedule whether your specific test requires fasting — LabCorp's scheduling system usually tells you, and the staff can confirm.

If fasting is required, schedule your appointment for the morning if possible, since it's easier to fast overnight than during the day. You can drink water up until the appointment. If you take medications, ask your doctor or LabCorp whether you should take them before a fasting test — some should be taken with food, while others won't affect the results.

For non-fasting tests, you can eat and drink normally before your appointment. Wear loose, short-sleeved clothing to make it easier for the phlebotomist to access your arm. If you know you have difficult veins or tend to feel faint during blood draws, let the staff know when you check in.

What happens during the blood draw

When you're called back, the phlebotomist will ask you to sit in a chair and will tie a tourniquet (a soft band) around your upper arm to make the veins more visible. They'll clean the inside of your elbow with an alcohol wipe and then insert a needle into a vein. You may feel a small pinch, but it's usually quick. The phlebotomist will draw the amount of blood needed — typically just a few tubes — and then remove the needle and apply pressure with a cotton ball or gauze.

The whole process takes three to five minutes. After the draw, you'll be asked to sit for a moment while the phlebotomist labels your samples. You can then leave. If you feel lightheaded or dizzy, let the staff know — they can have you sit for a few more minutes or offer you water or juice.

How your results are delivered and what they mean

LabCorp sends results to your doctor's office, which typically receives them within 24 to 48 hours. Your doctor will review them and contact you if anything is abnormal or if they want to discuss the findings. You can also view your results yourself through LabCorp's online patient portal if you create an account during check-in or on their website.

Results include reference ranges — the normal values for each test — so you can see whether your numbers fall within the expected range. If a result is outside the normal range, it's marked as "high" or "low," but that doesn't automatically mean something is wrong. Your doctor interprets the results in the context of your health history and symptoms. If you have questions about what your results mean, ask your doctor rather than trying to interpret them on your own.

What to do if you need to reschedule or cancel

If you scheduled online, you can cancel or reschedule through the same website by logging into your appointment. If you scheduled by phone or in person, call 1-800-LAB-CORP to make changes. Most locations allow cancellations up to a few hours before your appointment time, though policies vary.

If you miss your appointment without canceling, you may need to reschedule. There's no penalty for canceling or rescheduling, so let LabCorp know as soon as you realize you can't make it. If your doctor's order has an expiration date, check that the new appointment date falls before that date — orders are typically valid for 30 days.

Frequently Asked Questions

Can I eat or drink before my blood test?

It depends on the test. Some tests require fasting (no food or drink except water for 8 to 12 hours), while others don't. Ask when you schedule or call ahead to confirm. If fasting is required and you accidentally eat, call LabCorp to reschedule rather than having the test done with inaccurate results.

How long does a blood test appointment take?

The actual blood draw takes three to five minutes. Add 10 to 15 minutes for check-in and paperwork, and potentially longer if the location is busy. If you scheduled an appointment, you'll usually be seen within 15 minutes of your scheduled time.

Do I need my doctor's order to get a blood test at LabCorp?

No. You can order tests yourself through LabCorp's website without a doctor's order, though your insurance may not cover the cost. If you have insurance and your doctor ordered the test, bring the order so insurance will pay.

When will I get my test results?

Results are typically available within 24 to 48 hours. Your doctor receives them first and will contact you if anything needs attention. You can also check your results through LabCorp's online portal once they're ready.

What if I'm nervous about needles or have had trouble with blood draws before?

Tell the phlebotomist when you check in. They're experienced with nervous patients and can take extra time, use a smaller needle, or have you lie down during the draw if that helps. Staying hydrated and eating a light meal beforehand can also reduce dizziness.