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Current Residents

Twenty residents form the core (categorical) General Surgery Residency. A total of seven preliminary PGY-1 (5) and PGY-2 (2) residents make up the remainder of our 27 resident cohort. Several junior level residents from other Carilion residency and fellowship programs contribute to rotation assignments on the Trauma, ICU and Acute Care Surgery services, including: Neurosurgery, Emergency Medicine, Internal Medicine, OB/GYN, Podiatry and Pulmonary.

Fifth Year

Maria Castilla, M.D.


  • Undergraduate: Florida State University
  • Medical School: Florida State University College of Medicine

Clinical Interests: Minimally Invasive Surgery
Personal Interests: Travel, cooking, running, water sports
Future Plans: MIS fellowship

Mack D. Drake, D.O.

  • Undergraduate - Lipscomb University, Nashville, TN. Biology; Chemistry
  • Medical School - Pikeville College School of Osteopathic Medicine

Research Project: Vena Cava Filter flow dynamics
Clinical Interests: Trauma and Surgical Critical Care, Burn
Personal Interests: Traveling, Boating, SCUBA Diving
Future Plans: Trauma/Surgical Critical Care

Nicole Garcia, M.D.

  • Medical School: Medical University of South Carolina

Research Project: NSQIP, SCIP Surgical Site Infection
Clinical Interests: Laparoscopy, General Surgery
Personal Interests: Freddog Time, Eating What Other Residents Cook, Going to the Lake, Reading, Sleeping
Future Plans: Uncertain at this Time

Heath C Smith, M.D.

  • Undergraduate: Texas A&M University
  • Medical School: Texan A&M Health Science Center

Clinical Interests: General Surgery
Personal Interests: Flying, Triathlon, Working Out, Anything Outdoors
Future Plans: Rural General Surgeon

Xin Zhong, M.D.

  • Undergraduate: Tulane University
  • Medical School: Tulane School of Medicine

Research Project: Endoscopy Training Among Surgery Residents, Electronic VS Paper CME Forms
Clinical Interests: Advanced Laparoscopy, Robotic Surgery
Personal Interests: Aviculture, Gaming, Programming, Music Composition, Costume Design, Painting

Fourth Year

Fiona Denham, M.D.

  • Undergraduate: Vanderbilt University, Nashville
  • Medical School: Louisiana State University School of Medicine in New Orleans

Research Project: Combination Immunotherapy for High Risk and Advanced Melanoma Patients
Clinical Interests: Surgical Oncology
Personal Interests: Cooking (and hosting dinner parties), Painting, Live Music, Outdoor Recreations
Future Plans: Endocrine and Breast Surgery

Charles T. Harris, M.D.

  • Undergraduate: Hampden-Sydney College, Hampden-Sydney, Va.
  • Medical School: George Washington University, Washington, DC

Clinical Interests: Trauma, Critical Care and Acute Care Surgery
Future Plans: Fellowship, likely in Trauma/Critical Care

John B. Ortolani, M.D.

  • Undergraduate: College of the Holy Cross, Worcester, MA
  • Medical School: University at Buffalo School of Medicinie & Biomedical Sciences, Buffalo, NY

Research Project: Pancreatic Malignancies
Clinical Interests: Surgical Oncology, Colorectal Surgery Personal
Personal Interests: Running, Golf, Hockey
Future Plans: Colorectal Surgery Fellowship

Victor E. Stams, M.D.

  • Graduate: Tulane University, LA
  • Medical School: Southern Illinois University School of Medicine, Carbondale, IL

Clinical Interests: Plastic and Reconstructive Surgery
Personal Interests: Photography, Golfing, Swimming, Cooking, Surgery
Future Plans: Academic Reconstructive Surgery Practice - Private Practice Component, Medical Mission Work

Viswanathan Rajagopalan, M.D.

  • Graduate: Madras Christian College
  • Medical School:Thanjavur Medical College, India

Third Year

Robert Ferguson, D.O.

  • Undergraduate: West Virginia University, Morgantown, WV
  • Undergraduate: Marshall University, Huntington, WV
  • Medical School: West Virginia School of Osteopathic Medicine, Lewisburg, WV

Personal Interests: Exercise/Physical Fitness, Basketball, Football, Hunting, Fishing, Camping, Travel, Carpentry, Landscaping

Brian Fletcher, M.D.

  • Undergraduate: University of South Alabama
  • Medical School: University of South Alabama

Clinical Interests: Vascular Surgery, Colorectal Surgery, Public Health and Evidence Based Medicine
Personal Interests: Flying, Spear Fishing, Jogging, Movies
Future Plans: Pursue Vascular Surgery, Colorectal Surgery, Oncology Surgery

Nicholas Dean LeBlanc, M.D.

  • Undergraduate: Furman University, Greenville, SC
  • Medical School: LSU - New Orleans, N.O., LA

Clinical Interests: General Surgery
Personal Interests: My Australian Shepherd named Chloe, Triathlons (Ironman races), Soccer, Beautiful sunsets/sunrises, Being Outdoors
Future Plans: True General Surgeon in Mid-Sized City

Joshua Rivet, M.D.

  • Undergraduate: Palm Beach Atlantic University
  • Medical School: LSU Health Sciences Center, Shreveport

Personal Interests: Family and Weight Training
Future Plans: Private Practice General Surgeon or Reconstructive Plastic Surgeon

Kelsey Williams, M.D.

  • Medical School: Eastern Virginia Medical School

Clinical Interests: General Surgery
Personal Interests: Music, Sports/Fitness and Spending Time with my Family
Future Plans: Pursue Career in General Surgery

Second Year

Allison Farris, M.D.


  • Undergraduate: West Virginia University, Morgantown, WV
  • Medical School: West Virginia University School of Medicine

Clinical Interests: General Surgery
Personal Interests: Literature and Reading, Knitting and Hiking
Future Plans: General Surgeon in Rural Area

John M. Jeffries, M.D.

  • Undergraduate: University of Kentucky, Lexington, Kentucky
  • Medical School: University of Louisville School of Medicine, Louisville, Kentucky

Personal Interests: Gardening, Household Repairs, Spending Time Outdoors

Windy K. Matich, M.D.

  • Undergraduate: California University of Pennsylvania, California, PA
  • Undergraduate: West Virginia University, Morgantown, West Virginia
  • Medical School: West Virginia University School of Medicine, Morgantown, WV

Personal Interests: Reading, State and National Politics, Swimming, Team Sports, Watching Live Music

John Rudderow, D.O.

  • Undergraduate: Harding University
  • Medical School: Kansas City University of Medicine and Biosciences

Clinical Interests: General Surgery and Colorectal Surgery
Personal Interests: Marine Aquariums, Weight Lifting and Dogs
Future Plans: Become a General Surgery Resident

Scott James Ryan, M.D.

  • Undergraduate: Baylor University, Waco, Texas
  • Medical School: University of Arkansas for Medical Sciences College of Medicine, Little Rock, AR

Personal Interests: Wood Working, Spending Time with Family, Golfing, Hunting, Jogging

First Year

Gina Melissa Diaz Martinez, M.D.

  • Medical School: Universidad Nacional Autonoma de Honduras, Honduras

Personal Interests: Painting, Learning New Languages, Music, Health, Swimming and Nutrition

Ashley W. Gerrish, M.D.

Personal Interests: golf, basketball, tennis, pure barre, shopping
Clinical Interests: GI Surgery

Matthew T. Joy, M.D.

Clinical Interests: wound care and reconstruction, burn surgery, hand surgery
Personal Interests: music, tennis, backpacking, snowboarding
Future Plans: possibly fellowship training in hand or burn surgery

Matthew P. Kona, M.D.

Shervin Mirshahi, M.D.

Nathan R. Ogden, M.D.

Clinical Interests: percutaneous interventions, biomedical engineering
Personal Interests: music, college football, spending time with my wife and dogs
Future Plans: Diagnostic Radiology at Alleghany General, Pittsburgh, PA; plan to pursue fellowship in Interventional Radiology

Christopher M. Reed, M.D.

  • Undergraduate: University of North Carolina at Chapel Hill, Chapel Hill, NC
  • Medical School: University of North Carolina at Chapel Hill, Chapel Hill, NC

Dominic L. Taylor, M.D.

  • Undergraduate: Xavier University of Louisiana, New Orleans, LA
  • Medical School: Franklin University of Medicine and Science / Chicago Medical School

Personal Interests: music, travel, soccer, basketball
Clinical Interests: General Surgery

Hannah E. Woriax, M.D.

  • Undergraduate: University of North Carolina at Pembroke, NC
  • Medical School: North Carolina - Brody School of Medicine at East Carolina