Laboratory Medicine and Pathology supports physicians at Mayo Clinic and elsewhere by performing testing services for diagnostic and therapeutic evaluations. More than 1,600 people, working in numerous specialty laboratories, staff the department. They form one of the largest clinical laboratories in the world, which performs more than 13 million tests annually. The laboratory teams consists of highly experienced physicians, scientists, medical technologists, medical technicians, lab assistants, biologists, chemists, microbiologists, geneticists, and other specialists all working collaboratively.

With more than 100 physicians in the practice, Mayo's most extensive laboratory services are located in Minnesota. Besides serving Mayo Clinic patients, the laboratories also do testing for other clinics and hospitals nationally and internationally. The Florida and Arizona departments provide the vast majority of testing for their practices.

Laboratory specialty areas at Mayo Clinic include:

  • Anatomic Pathology
  • Clinical Biochemistry and Immunology
  • Clinical Microbiology
  • Experimental Pathology and Laboratory Medicine
  • Hematopathology
  • Laboratory Genetics
  • Transfusion Medicine

Mayo Medical Laboratories (MML) is the referral center for Mayo Clinic. MML specializes in esoteric laboratory testing for health care organizations throughout the United States and around the world.


See department pages at each Mayo location. Includes lists of doctors.


Laboratory Medicine and Pathology


Laboratory Medicine and Pathology


Laboratory Medicine and Pathology