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Our Providers

Meet our Team


Joseph G. Jemsek, MD, FACP, AAHIVS

Board Certified Internal Medicine and Infectious Disease

Dr. Jemsek is a board-certified physician in infectious disease and internal medicine. He received his medical degree from the University of Illinois, Medical Center of Chicago, and completed his internship and residency at the Medical University of South Carolina in Charleston, SC. He then went on to complete a postgraduate fellowship at Baylor College of Medicine at the Texas Medical Center in Houston, TX. Dr. Jemsek practiced medicine for more than two decades at the Nalle Clinic in Charlotte, NC, and diagnosed one of the first patients with AIDS in North Carolina in 1983. In 2000, he founded a specialty infectious disease practice with the goal of serving patients with HIV/AIDS, in addition to practicing general infectious disease (including Lyme Borreliosis Complex). His practice soon evolved as he began treating more and more patients with Lyme Borreliosis Complex (LBC), also commonly referred to as Lyme disease, and began solely treating patients with Lyme disease in 2005. The Jemsek Specialty Clinic (JSC) in Washington, DC officially opened its doors in January 2010; since that time, the practice has grown, with the addition of four physician assistants and two nurse practitioners, all dedicated to serving patients from around the world with LBC.

More detailed information on Dr. Jemsek’s background may be found here.



Kim Fogarty, PA-C

Certified Physician Assistant

Kim Fogarty joined JSC in March 2010, shortly after the clinic opened in DC. She received her master’s in Physician Assistant Studies from DeSales University in Center Valley, PA, and her undergraduate bachelor of science in Health Sciences, with a minor in Biology, from James Madison University in Harrisonburg, VA. Kim began her physician assistant career in the hospital emergency department; after three years of working in the ER, she moved into family practice/urgent care, where she remained for five years before coming to JSC. She has practiced in the Tidewater area in Virginia as well as Fredericksburg, VA. Prior to becoming a physician assistant, Kim worked as a student athletic trainer and as an EMT. For recreation, Kim enjoys an active lifestyle of fly fishing in northeastern Pennsylvania, running, playing sports, and is a devoted Washington Redskins fan.


Rachel Markey, PA-C

Certified Physician Assistant

Rachel Markey, PA-C, joined JSC in the fall of 2013. She received her master of science in physician assistant studies from Western University of Health Sciences in California. She also attended St. Mary’s College of Maryland for undergraduate studies, where she received her bachelor’s degrees in biology and anthropology with a minor in environmental science. Prior to joining JSC, Rachel practiced for several years in internal medicine in Alexandria, VA. Rachel enjoys a wide variety of activities, including Pilates, soccer, and running, as well as cooking and spending time with friends and family.


Candace M. Willett, PPCNP-BC

Pediatric Nurse Practitioner

Candace M. Willett, PPCNP-BC joined JSC in August of 2017. She serves as JSC’s Pediatric Nurse Practitioner, focusing on the clinic’s youngest patients from infancy up to early adulthood. Prior to joining our specialty clinic, she worked in the field of Dermatology. She initially attended Mount
Holyoke College in South Hadley, MA where she earned a Bachelor of Arts (BA) in Psychology. Pursuing her lifelong passion for the health sciences, she then went on to obtain a Masters of Public Health (MPH) in Maternal and Child Health from the School of Public Health and Health Services at The George Washington University in Washington, DC. With a passion for preventive health and caring for infants, children, adolescents and their families she returned to school to pursue a Masters in Nursing Science (MSN) from Yale School of Nursing located in New Haven, CT. She is ANCC board certified as a Pediatric Primary Care Nurse Practitioner (PPCNP-BC). Candace believes that her MPH degree combined with MSN affords her a greater understanding of the value of health promotion and health education as it pertains to a holistic approach to care and improving overall health outcomes for children and families.


Anne Walch, MHS, PA-C

Certified Physician Assistant

Anne Walch has been working with Dr. Jemsek since 2009, beginning at his Fort Mill, SC practice location. She is based in Asheville, NC, but travels to DC to see patients at JSC one to two weeks out of each month. Anne received both her master of health science and her undergraduate bachelor of science in Psychology from Duke University in Durham, NC. She worked in Duke’s Family Medicine Department for 7 years; Nepal for 3 years; then in an integrative medicine practice for 13 years. In her spare time, Anne enjoys music, reading, traveling and activities that allow her to spend time in nature.

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Jemsek Specialty Clinic
2440 M Street N.W., Suite 205
Washington, DC 20037

Phone: (202) 955-0003
Fax: (866) 457-0397

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