Our Physicians

Darrel R. Rinehart, M.D.

Internal Medicine

Darrel R. RineHart

Dr. Rinehart was born in Vanderberg, Indiana. He received his undergraduate education at Asbury College in Wilmore, Kentucky. He received his medical education at the University of Indiana School of Medicine in Indianapolis. Dr. Rinehart completed his specialty training at the University of Kentucky Medical Center in Lexington, KY. He is board certified in Internal Medicine and began his medical practice in Columbia in 1984.

John O. Simmons, M.D., M.P.H.

Internal Medicine

John O. Simmons

Dr. Simmons was born in Humboldt, TN. He received his undergraduate degree at Harding College in Searcy, Arkansas and his medical education at the University of Alabama School of Medicine in Birmingham, AL. He completed his specialty training at Tripler Army Medical Center in Honolulu, Hawaii, and a fellowship in Internal Medicine at Walter Reed Army Medical Center in Washington, D.C. He is board certified in Internal Medicine. Dr. Simmons holds a Master’s degree in Public Health from the Uniformed Services University for Health Sciences in Bethesda, Maryland. He began his practice in Columbia in 1989.

Gaylon L. Harris, M.D.

Internal Medicine

Gaylon L. Harris

Dr. Harris was born in Knoxville, Tennessee. He received his undergraduate degree at the University of Memphis and his medical education at the University of Tennessee College of Medicine. Dr. Harris completed his specialty training at the University of Florida in Gainsville. He is board certified in Internal Medicine and began his medical practice in Columbia in 1991.

Emilio J. Rodriguez, M.D.

Rheumatology, Internal Medicine

Emilio J. Rodriguez

Dr. Rodriguez was born in Puerto Rico. He received his undergraduate degree at Boston University in Massachusetts and his medical education at George Washington University School of Medicine in Washington, D.C. Dr. Rodriguez completed his specialty training at the University of Miami Hospitals and Clinics in Miami, FL. He is board certified in Internal Medicine and Rheumatology and began his medical practice in Columbia in 1994.

Shawn L. Reed, M.D.

Internal Medicine

Shawn L. Reed

Dr. Reed was born in Newark, Ohio. He received his undergraduate degree at Princeton University in Princeton, New Jersey and his medical education at Case Western Reserve University School of Medicine in Cleveland, OH. Dr. Reed completed his specialty training at Vanderbilt University in Nashville. He is board certified in Internal Medicine and began his medical practice in Columbia in 1998.

Anuradha P. Mann, M.D.

Internal Medicine

Anuradha P. Mann

Dr. Mann was born in India. She received her undergraduate degree and medical education at Bangalore Medical College in Bangalore, India. Dr. Mann completed her specialty training at William Beaumont Hospital in Royal Oak, Michigan. She is board certified in Internal Medicine and began her medical practice in Columbia in 1998.

Gibran B. Naddy, M.D.

Internal Medicine, Sleep Medicine

Gibran B. Naddy

Dr. Naddy is a Columbia native. He received his undergraduate degree at the University of Memphis, TN. Dr. Naddy completed his medical education and specialty training in Internal Medicine at the University of Tennessee College of Medicine in Memphis. He is board certified in Internal Medicine and Sleep Medicine and began his medical practice in Columbia in 1999.

James H. Marshall, M.D.

Urology

James H. Marshall

Dr. Marshall was born in Davidson County, TN. He received his undergraduate degree at David Lipscomb University. Dr. Marshall completed his medical education and specialty training in urology at the University School of Medicine in Memphis, TN. Dr. Marshall is board certified by the American Board of Urology. He has been in practice in Columbia since 1990. He joined CORE Physicians in 2003.

Hrishi M. Kanth, M.D.

Pediatrics, Internal Medicine

Hrishi M. Kanth

Dr. Kanth was born in Charleston, West Virginia. He received his undergraduate degree at Virginia Tech, in Blacksburg, Virginia. Dr. Kanth completed his medical education at West Virginia University and his specialty training at Saint Francis Hospital/University of Illinois in Peoria, IL. Dr. Kanth is board certified in Internal Medicine. He joined CORE Physicians in 2007.

David M. Turner, M.D.

Pediatrics, Family Medicine

David M. Turner

Dr. Turner was born in Saskatoon, Canada. He received his undergraduate degrees in Biology and Physical Therapy at the University of Saskatchewan. He completed his medical education and specialty training at the same university in their College of Medicine. He is board certified in Family Medicine and worked as an emergency physician for 22 years prior to joining CORE Physicians in 2007.

Dr. Turner’s interests include bio-identical hormone replacement and integrative medicine, utilizing a holistic and herbal approach to prevention and treatment.