Updated January 21, 2026

Winter Storm Fern, a major winter weather event, is moving through a large portion of the United States, potentially impacting the FedEx hub in Memphis, TN. Mayo Clinic Laboratories’ Global Logistics team is working to move shipments from FedEx to other commercial shipping options. 

We understand that alternate commercial shipping options are not available in all markets. In the event we are unable to transport these samples, we will ask that you hold your samples at your location. You will be contacted directly if there are modifications or cancelations to your specific route. 

Due to commercial shipping restrictions, Category A samples cannot be shipped.  

Mayo Clinic Laboratories continues to monitor the situation and will provide updates as needed. If you have questions, please contact Customer Service at 800-533-1710 and ask to be forwarded to the Global Logistics Specialist.