About Southern Internal Medicine Lake City FL Providers
Southern Internal Medicine - Physicians | Lake City, FL

Dr. Guy S. Strauss, D.O., F.A.C.O.I.

Dr. Strauss has been practicing since 1987 and is board certified in internal medicine and critical care. With a passion for continuing medical education in order to provide the most up-to-date care for his patients, Dr. Strauss has received the American Medical Association's Physician  Recognition Award a total of 7 times. He has also served as a trainer and mentor for the Medical College at the University of Florida and on numerous committees for Lake City Medical Center and Shands at Lake Shore Hospital to help improve the quality of medical care in our community. Dr. Strauss is proud to be part of the staff at both Lake City Medical Center and Lake City Surgery Center.

After graduating from Florida State University in 1995 as an ARNP, Stefanie began her career with Dr. Strauss. She has a loyal patient following and has developed an excellent reputation because she enjoys providing exceptional care to the residents of Columbia County and the surrounding areas. A lifelong resident of Lake City, when Stefanie is not at work she stays busy with her husband and three children as they have

many family activities.

Stefanie Jackson, ARNP

Get the attentive care you deserve at Southern Internal Medicine in Lake City, FL


Accepting new patients, 16 years old and older.

We have more than 40 years of combined experience!

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Dr. Bryce Catarelli joined Southern Internal Medicine in 2014 after graduating from the University of Central Florida's ARNP program. Dr. Bryce was an outstanding student, maintaining a 4.0 GPA. She spent her RN career working in the hospital oncology setting as an Oncology Certified Nurse, providing compassionate care to those who need it most. She rapidly gained popularity at Southern Internal Medicine as a compassionate and very thorough ARNP. Dr. Bryce recently received her Doctorate in Nursing Practice from the University of Florida in 2016. When she isn't at work, Dr. Bryce enjoys spending time outdoors with her husband, Ryan, her goldendoodle, Lily, and labradoodle, Maya.

Dr. Bryce Catarelli, DNP