Thanksgiving Holiday Shipment Schedules

Operational Update

Domestic Clients

For the Thanksgiving holiday, Mayo Clinic Laboratories' specimen pickup and delivery schedules will be altered. To ensure specimen viability and prevent turnaround time delays, follow the guidelines below.

  • Delays extending past the already planned 24 hours are possible. Shipments sent Wednesday, Nov. 22 will not arrive until Friday, Nov. 24, at the earliest when using FedEx or UPS. To help minimize sample impact, shipping carriers have been adjusted for the best possible outcome.
  • Specimens shipped on Wednesday, Nov. 22 via FedEx or UPS may not arrive until Saturday, Nov. 25. Therefore, the recommendation is to hold samples – especially refrigerated samples – at your facility.
  • Self-shippers: If you choose to ship via UPS or FedEx, add additional frozen cool packs to refrigerate shipments and use sufficient dry ice to cover the extended transit time.

Domestic client shipping to Mayo Clinic Laboratories

Tuesday, Nov. 21

  • Normal pickups – Originating shipping location delays will result in earliest arrival to Mayo Clinic Laboratories on Friday, Nov. 24.

Wednesday, Nov. 22

  • Mayo Clinic Laboratories recommends not to ship FedEx or UPS.Normal pickups remain for clients wishing to ship.

Thursday, Nov. 23

  • No pickups.

Friday, Nov. 24

  • Normal pickups.

For questions, please contact Customer Service at 800-533-1710 and ask to be forwarded to the Global Logistics specialist.

International Clients

The United States will observe the Thanksgiving holiday on Thursday, Nov. 23. On this day, Mayo Clinic Laboratories will be open; however, sample shipments and deliveries to our laboratories will not be made by the carriers.

To safeguard your samples, we strongly recommend the following guidelines for international shipments except for clients in Saudi Arabia:

  • For shipments with a one-day transit time, do not ship on Wednesday, Nov. 22.
  • For shipments with two or three-day transit times, do not ship on Monday, Nov. 20 or Tuesday, Nov. 21, as these shipments could incur potential delays per U.S. Customs and operations. They may not be delivered until Friday, Nov. 24 or later. Please hold irretrievable samples in stability.
  • Normal carrier (UPS, FedEx, DHL) deliveries will resume Friday, Nov. 24. Please ensure “Saturday Delivery” is selected on your airway bill when creating shipments as per standard shipping process.

International client shipping to Mayo Clinic Laboratories

Monday, Nov. 20

  • 1-day transit: OK to ship
  • 2-day transit: OK to ship
  • 3-day transit: Do not ship (except for clients in Saudi Arabia)

Tuesday, Nov. 21

  • 1-day transit: OK to ship
  • 2-day transit: Do not ship(except for clients in Saudi Arabia)
  • 3-day transit: OK to ship

Wednesday, Nov. 22

  • 1-day transit: Do not ship (except for clients in Saudi Arabia)
  • 2-day transit: OK to ship

Thursday, Nov. 23

  • OK to ship

For questions and concerns, please send an email to or to your international regional service representative.

Mayo Clinic Laboratories

This post was authored by the Marketing Team at Mayo Clinic Laboratories.