Medical Services Staff

Medical Staff

Peter Davis, MD, FACP
Staff Physician and Medical Director

Dr. Davis attended medical school at the University of Kansas and then trained in internal medicine at the University of Alabama Hospital. He also completed a fellowship in sports medicine at UT Southwestern and Methodist Hospitals of Dallas. He has hospital affiliations at Methodist Hospital and Baylor University Medical Center. Dr. Davis is board certified in internal medicine and has a certificate of added qualification in sports medicine.


Nancy Merrill, MD
Staff Physician and Medical Director

Dr. Merrill graduated Summa Cum Laude from Macalester College where she was a member of Phi Beta Kappa. She received her Doctor of Medicine from L.S.U., and trained at Charity Hospital in New Orleans. She practiced Emergency Medicine prior to joining the medical staff at Tulane University Student Health Center. Dr. Merrill is married and has two daughters.

Nancy Merrill 

Arthi Krishnan, MD
Staff Physician and Quality Assurance

Dr. Krishnan received her undergraduate degree from Georgia Institute of Technology in Atlanta, GA.  She attended medical school at the Medical College of Georgia in Augusta, GA.  She completed her internship in pediatrics at the Children’s Hospital of the King’s Daughters in Norfolk, VA and completed her pediatric residency at the University of Virginia in Charlottesville, VA.  She completed a one year fellowship in college health at the University of Virginia.  She is board certified in Pediatrics and is a fellow of the American Academy of Pediatrics.  Dr. Krishnan is married and has a son and a daughter.  She and her family enjoy cheering for the mustangs at various sporting events! 

Arthi Krishnan

Lance Davis, MD
Staff Dermatologist

Dr. Lance Davis is a board-certified dermatologist committed to excellence in skin care, from simple to complex, for patients of all ages. As a board-certified dermatologist, he has extensive medical, surgical, and cosmetic dermatology experience. He additionally specializes in skin cancer and skin tumor surgery. Dr. Davis is a graduate of UT Southwestern Medical School, graduating with highest honors. Following medical school, he completed his dermatology residency at Baylor Scott and White, serving as Chief Resident. Dr. Davis grew up in Dallas, and his SMU roots run deep. He is married and has two sons.


Cyndi Heath, CMA
Lab and X-Ray Technician

Nursing Staff

Diane Melcher, R.N., M.S.N.
Director of Nursing

 Diane Melcher

Madge Earnshaw, R.N.
Staff Nurse


Charlotte Rohr, R.N.
Staff Nurse

Emily Howley, R.N.
Staff Nurse

Pharmacy Staff

Kathy Johnson, R. Ph.

 Kathy Johnson

Cynthia Nicholson, R. Ph.