About Us

RHEUMATOLOGIST

Dr. McCullum graduated from medical school at the Kentucky College of Osteopathic Medicine in Pikeville, KY in 2016. She completed Internal Medicine residency at The University of Kentucky in Bowling Green, KY in 2019 and is board certified in Internal Medicine. In June 2021, she completed Rheumatology fellowship through a University of South Florida program based in Hudson, FL.

Dr. McCullum is also a Pharmacist, graduated from the Duquesne University School of Pharmacy in Pittsburgh, PA in 2009. She worked as a community Pharmacist and taught an after school pre-pharmacy course to high school students in the Louisville, KY area until 2012 when she pursued a career in medicine.

Dr. McCullum serves as a Founding Faculty member of the proposed Orlando College of Osteopathic Medicine. She is also a preceptor for the University of Florida College of Pharmacy.

In her free time, she enjoys being a mom and spending time with her husband, son, and daughter.

RHEUMATOLOGIST

Dr. J. Antonio Martinez is a native of Miami, Florida who has been providing Rheumatological care in Orlando and the surrounding communities since 2018. Dr. Martinez completed his BS in Biology at the University of Miami. He then obtained his Doctorate in Osteopathic Medicine from Lake Erie College of Osteopathic Medicine in 2013. He completed his Internal Medicine Residency at Florida State University in 2016 while serving as their chief resident and then completed his Rheumatology Fellowship at the University of Florida in 2018. He sees a wide range of conditions including, but not limited to, SLE, RA, Psoriatic Arthritis, Ankylosing Spondylitis, Vasculitis, Scleroderma, Sjogren's Syndrome, Inflammatory Myositis, Sarcoidosis, Connective Tissue-related Pulmonary Fibrosis, Osteoarthritis, and more. Dr. Martinez is passionate about serving his patients and working as a team with each of them to reach their goals.

In his free time, Dr. Martinez enjoys Mixed Martial Arts, tabletop games, action movies, and most things considered nerdy. He is excited to have joined Lakeshore Rheumatology and provide top tier medical services to our surrounding communities. Dr. Martinez is fluent in both English and Spanish.

INTERNAL MEDICINE PHYSICIAN

Dr. Mejia is originally from Cali, Colombia. He attended medical school at Universidad Libre and later completed training at Geisinger Medical Center in Danville, PA where he graduated as Internal Medicine physician. He is board certified in Internal Medicine. He relocated to Kentucky in 2013 and practiced as a Hospital Physician where he met his beloved wife, Andrea McCullum. In 2019 they relocated to Florida to pursue further training and have been living in the area ever since. He practiced as Primary Care Physician in Tampa, then as a Hospital Physician at Clermont since 2021. Dr. Mejia has now joined his wife at the clinic focusing his knowledge and experience in Rheumatology with a particular interest in Rheumatoid Arthritis, Ankylosing Spondylitis, Psoriatic Arthritis, and Osteoporosis. He is very passionate about medicine and genuinely cares about his patients. Dr. Mejia is fluent in both English and Spanish.

Dr. Mejia loves to spend good quality time with his wife and 2 kids, traveling, going to the beach and doing outdoor activities. He also loves animals, particularly dogs and horses and enjoys living out in the country.