How to Reschedule Your LabCorp Appointment

The fastest way to reschedule is through your LabCorp account online or by phone

You can reschedule most LabCorp appointments without starting over from scratch. The method depends on how you booked it: if you made the appointment through the LabCorp website or their mobile app, you can change the date and time directly in your account. If you booked by phone or in person, you'll need to call LabCorp to make the change.

LabCorp's customer service line is available seven days a week. When you call, have your appointment confirmation number ready — it's on your confirmation email or text message. The representative can move you to a different date and time at the same location, or switch you to a different LabCorp location if that works better for your schedule.

If you're rescheduling because you need to reschedule a fasting test or a test that requires specific preparation, mention that when you book the new time. The representative will confirm that the new appointment slot still allows you to follow the same preparation instructions.

Key Takeaways

• Online or app rescheduling is available 24/7 if you booked through LabCorp's website or mobile app — just log in and change your date and time.
• Phone rescheduling requires your appointment confirmation number, which appears on your confirmation email or text.
• You can move your appointment to a different LabCorp location or change the time at the same location without losing your spot.
• If your test requires fasting or other preparation, confirm the new appointment time still gives you enough time to prepare correctly.
• LabCorp customer service operates seven days a week, so you can reschedule outside standard business hours.

Rescheduling through your online LabCorp account

Log into your account on the LabCorp website or open the LabCorp mobile app. Navigate to your upcoming appointments — this section is usually labeled "My Appointments" or "Scheduled Tests." Find the appointment you want to change and select the option to reschedule or modify.

The system will show you available time slots at your chosen location. Pick a new date and time, then confirm the change. You'll receive a new confirmation email or text with your updated appointment details. This entire process takes a few minutes and doesn't require you to speak with anyone.

If the system won't let you reschedule online — for example, if your appointment is less than 24 hours away — you'll need to call LabCorp instead. The website or app will usually tell you this before you try to complete the change.

Rescheduling by phone

Call LabCorp's customer service line at the number on your confirmation email or text. Have your confirmation number ready when you call. Tell the representative your new preferred date and time, and whether you want to stay at the same location or switch to a different one.

The representative will check availability and move your appointment. They'll confirm the new date and time with you over the phone and send a new confirmation email or text. If you have questions about preparation for your test — fasting, medication timing, what to bring — ask before you hang up so you don't have to call back.

Wait times vary depending on how busy LabCorp is. Calling early in the morning or on weekdays typically means shorter hold times than calling in the afternoon or on weekends.

What happens to your original appointment

When you reschedule, your original appointment slot is cancelled and released back into the system. You don't need to cancel it separately. Your new appointment replaces it completely.

If you've already paid for your original appointment through your insurance or out of pocket, that payment stays attached to your account and applies to your rescheduled test. You won't be charged twice.

Rescheduling if you need to change locations

LabCorp has thousands of patient service centers across the United States. If your original appointment is at one location but another location is more convenient, you can switch during rescheduling.

When you reschedule online, the location dropdown will show you other LabCorp centers near you with available appointments. When you reschedule by phone, tell the representative which location you prefer, and they'll check availability there. Some locations fill up faster than others, so if your first choice is full, ask about nearby alternatives.

Keep in mind that if your test requires specific equipment or preparation, not all locations may offer it. The representative or the online system will let you know if your test type is available at your chosen location.

Rescheduling tests that require preparation

If your test requires fasting, medication timing, or other preparation steps, make sure your new appointment time still works with those requirements. For example, if you need to fast for 12 hours before a blood draw, don't schedule an appointment so late in the day that you'd have to fast overnight and into the next morning.

When you reschedule, the confirmation will include the same preparation instructions as your original appointment. Read through them to confirm they still apply to your new time. If you're unsure whether the new time changes anything about how you should prepare, call LabCorp and ask before your appointment day.

If you can't reschedule online or by phone

In rare cases, an appointment may be locked and unable to reschedule through normal channels — for example, if it's part of a court-ordered or employer-mandated test. If the online system or phone representative tells you the appointment can't be rescheduled, ask whether you need to cancel and book a new one instead, or whether there's a different process for your specific test type.

If you're having trouble reaching LabCorp by phone, try calling during off-peak hours (early morning or late evening) or use the online chat feature on the LabCorp website if it's available. Some LabCorp locations also allow you to walk in and reschedule in person at the patient service center.

Frequently Asked Questions

Can I reschedule my appointment the day before or day of?

It depends on how busy that location is. Online rescheduling typically won't work for appointments less than 24 hours away. Call LabCorp directly to see if they have an open slot at your preferred time. Same-day or next-day slots are sometimes available, especially at larger centers, but you may have limited options.

Will I lose my place in line if I reschedule?

No. Rescheduling doesn't affect your test results or any prior information LabCorp has on file. Your new appointment is treated as a regular booking with normal wait times at that location and time.

What if I need to reschedule multiple times?

You can reschedule as many times as you need through the same methods — online or by phone. There's no limit on how many times you can change your appointment. Just make sure you're not rescheduling so far out that your doctor's order expires or your insurance coverage changes.

Do I need to bring anything different if I reschedule to a different location?

Bring the same documents you would have brought to your original appointment: your insurance card, photo ID, and any paperwork your doctor gave you. Different LabCorp locations follow the same procedures, so nothing changes based on where you go.

What if my insurance or doctor's order expires before my rescheduled date?

Check your confirmation paperwork or call your doctor's office to confirm your order is still valid on your new appointment date. Insurance coverage and doctor's orders have expiration dates. If either one expires before your rescheduled appointment, you'll need to contact your doctor or insurance company to renew it before you go in for your test.