Do You Need an Appointment at LabCorp, or Can You Walk In?

Most LabCorp locations accept walk-ins, but scheduling ahead saves you time and guarantees a phlebotomist will be ready for you

You do not have to book an appointment at LabCorp. The vast majority of their patient service centers operate on a walk-in basis, meaning you can show up during business hours without calling ahead. However, LabCorp also lets you schedule appointments online or by phone, and doing so typically means a shorter wait — sometimes no wait at all.

Whether you walk in or book depends on your situation. If you have a doctor's order and know you need bloodwork done this week, walking in works fine. If you want to avoid a waiting room or you're coming during a busy time, scheduling takes five minutes and removes the guesswork.

Key Takeaways

• LabCorp locations accept walk-ins during posted hours, so you can get bloodwork done the same day without an appointment.
• Scheduling an appointment online at labcorp.com or by phone usually means shorter or no wait time.
• You will need your doctor's order, insurance card, and photo ID whether you walk in or have an appointment.
• Wait times for walk-ins vary by location and time of day; early morning and mid-week visits tend to be faster.
• If a location is temporarily closed or has limited hours, the LabCorp website will show that before you travel there.

Walking in without an appointment

Walking into a LabCorp patient service center works because they staff phlebotomists throughout the day to handle both scheduled and unscheduled visitors. You arrive with your doctor's order, check in at the front desk, and wait your turn. The wait can range from a few minutes to 30 or 45 minutes depending on how busy the location is and what time you arrive.

Early mornings — typically between 7 a.m. and 9 a.m. — tend to have shorter waits. Mid-afternoon and late afternoon can get busier. Weekday mornings are generally faster than weekend mornings. If you walk in and the wait looks long, you can ask the staff how many people are ahead of you before you decide to stay.

Walk-ins work best when you have flexibility about timing. If you need bloodwork done but don't have a specific time constraint, walking in is straightforward and requires no advance planning.

Scheduling an appointment online or by phone

You can book an appointment at labcorp.com by entering your zip code, selecting a location, and choosing an available time slot. The website shows you which times are open at each nearby center. You can also call LabCorp's main line at 1-800-LAB-CORP (1-800-522-2767) to schedule by phone, though the website is usually faster.

When you schedule online, you'll enter your name, date of birth, phone number, and the type of test your doctor ordered. LabCorp will send you a confirmation with your appointment time and a reminder text or email. Arrive 10 to 15 minutes early to check in and complete any paperwork.

Appointments typically reduce your wait time to near zero, though occasionally a location runs behind. If you book a specific time slot, you're telling LabCorp to expect you, and they staff accordingly.

What you need to bring either way

Whether you walk in or have an appointment, bring three things: your doctor's order (also called a lab requisition or test order), your insurance card, and a photo ID. Your doctor's office sends the order to LabCorp ahead of time, or you can bring a paper copy with you. LabCorp can look it up by your name and date of birth if you don't have it in hand, but having it speeds up check-in.

Your insurance card tells LabCorp how to bill your insurance. If you don't have insurance, LabCorp will quote you a cash price before the draw. Photo ID confirms your identity and ensures the blood sample is labeled correctly with your information.

When certain locations have limited hours or are closed

Some LabCorp patient service centers have reduced hours on weekends, and a few locations close on Sundays. A small number of centers may temporarily close for staffing or maintenance. Before you travel to a location, check labcorp.com or call ahead to confirm it's open and what the current hours are.

The LabCorp website's location finder shows hours for each center. If you're planning to go on a weekend or holiday, that's the best place to verify. If a location is closed, the site will suggest the nearest open center.

Fasting and preparation before your visit

Your doctor's order will specify whether you need to fast before your bloodwork. Fasting usually means no food or drink except water for 8 to 12 hours before the draw — typically overnight. Some tests don't require fasting at all. Check your order or call your doctor's office to confirm.

If you have a scheduled appointment and realize you need to fast, you can still keep that time. Just don't eat or drink anything but water from the night before. If you walk in and weren't sure about fasting, tell the staff when you check in; they can tell you whether your specific test requires it and whether you should reschedule if you've eaten.

Getting your results after the visit

After your blood draw, LabCorp sends results to your doctor's office, usually within one to three business days. Your doctor will review them and contact you if anything needs attention. You can also view many results yourself through LabCorp's online patient portal, LabCorp OnDemand, if your doctor's office has set that up for you.

Ask the phlebotomist or check-in staff how you'll receive your results — whether your doctor will call you, whether you can check online, or both. This varies by your doctor's office and what they've arranged with LabCorp.

Frequently Asked Questions

Can I schedule an appointment for someone else?

No, LabCorp requires the person being tested to schedule their own appointment or have a parent or legal guardian do it for a minor. You'll need the patient's date of birth and the doctor's order information to book.

What if I have an appointment but I'm running late?

Call the location directly as soon as you know you'll be late. Many locations will hold your appointment slot for 15 to 30 minutes. If you're more than 30 minutes late, you may need to reschedule or check in as a walk-in and wait your turn.

Do I need an appointment if my doctor sent my order directly to LabCorp?

No. Whether your doctor sent the order electronically or you're bringing a paper copy, you can walk in anytime during business hours. An appointment just means you won't wait.

Can I cancel or change my appointment online?

Yes, you can cancel or reschedule through labcorp.com or by calling 1-800-LAB-CORP. If you cancel, do it at least a few hours before your scheduled time so LabCorp can open that slot for someone else.

What if the location I want is fully booked?

The website will show you other nearby locations with available times. You can also walk in to a fully booked location — appointments don't prevent walk-ins, they just mean scheduled patients are seen first. Or check back on the website later; appointment slots open up as people cancel.