Mount Carmel Health System

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Current Residents

Residents in the Mount Carmel Family Medicine Residency Program come from all walks of life. As diverse as their backgrounds and interests, they share at least one thing in common — the desire to receive the very best education and preparation for family medicine.

The rigors and responsibilities of the program test each resident's knowledge, skills and experience. As a result, they find something within themselves and one another that will serve them throughout their careers. They emerge more than doctors and colleagues; they become strong assets to the field of family medicine.

Third Year Residents

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Andrew Sitzmann, MD

  • BA: University of Northern Iowa, 1995
  • MD: University of Toledo College of Medicine, 2011
  • Special Interest: Preventative Medicine, Women’s Health, Infectious Disease (in particular HIV medicine), underserved populations, medical missions
  • Outside Interest: Running, biking, swimming, gardening, hiking, camping, climbing, listening to music, and travel-particularly international.
Mount Carmel Residents discuss why they chose Mount Carmel over other Columbus, Ohio, healthcare systems for their residency.
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Sotirios Koros, DO

  • BA: University of Cincinnati, 2007
  • DO: Ohio University, 2012
  • Special Interests: Inpatient medicine, Outpatient medicine, Dermatology
  • Outside Interests: Travel, tennis, family, Greek culture
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David Moore, MD

  • BA: University of Michigan, 2006
  • MD: American University of the Caribbean, 2012
  • Special Interest: Pediatrics, Maternal Fetal Medicine
  • Outside Interest: Cooking, Camping, Fishing
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Ruheena Sadi, MD

  • BA: Mount Holyoke College, 2005
  • MD: Ross University, 2011
  • Special Interest: Rural Medicine, Urgent Care, Office-Based Practice
  • Outside Interest: Cooking, baking, reading, yoga, cats
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Lisa Warner, MD

  • BA: Duke University, 2006
  • MD: University of Toledo, 2011
  • Special Interest: Women’s Health, Sleep Medicine
  • Outside Interest: Art, Sewing, Eating good food, Playing video games, Bird-watching, Traveling, Studying foreign languages.

Second Year Residents

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Candace Nguyen, MD

  • BS Degree: Place: Temple University, 2005
  • MD Degree: Place: St. Matthew’s University School of Medicine, 2012
  • Special Interest: Comprehensive medical care, preventative medicine, international health, primary care, dermatology, community outreach.
  • Outside Interest: Cooking, fishing, exploring new environments, tropical botanical gardens, aquariums, family, food and culture.
Mount Carmel Residents discuss why they chose Mount Carmel over other Columbus, Ohio, healthcare systems for their residency.
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Maria Schreck, DO

  • BA Degree: Place: Franciscan University of Steubenville, 2009
  • MD Degree: Place: Ohio University Heritage College of Osteopathic Medicine, 2013
  • Special Interest: Geriatrics, pediatrics, women’s health, NFP, nutrition
  • Outside Interest: Spending time outside – hiking biking. Cooking, baking. Spending time with my husband and family. Reading a good book. Crafts.
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Harkiran Singh, MD

  • BA Degree: Place: University of Buffalo, 2007
  • MD Degree: Place: American University of the Caribbean, 2012
  • Special Interest: Urgent Care
  • Outside Interest: Musical instruments (guitar, harmonium, tabla), comic books, Buffalo Bills Football
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Rachel Snyder, MD

  • BA Degree: Place: University of Dayton, 2009
  • MD Degree: Place: Wright University, Boonshoft School of Medicine, 2013
  • Special Interest: Geriatrics
  • Outside Interest: Love spending time with family and friends. Enjoy hiking with my parent’s dog. Passion for crafting.
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Colin Turney, MD

  • BA Degree: Place: Miami University, 2009
  • MD Degree: Place: The Ohio State University, 2013
  • Special Interest: Primary care, neurology, cardiology, healthcare policy
  • Outside Interest: Playing electric violin, watching sports, cars
Mount Carmel Residents discuss why they chose Mount Carmel over other Columbus, Ohio, healthcare systems for their residency.
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Tonnetta Quigley, MD

  • BS Degree: Place: The Ohio State University
  • MD Degree: Place: The Ohio State University College of Medicine
  • Special Interest: Primary Care, women's health, underserved populations
  • Outside Interest: Spending time with my husband and our three dogs, photography, sewing, listening to music and going to concerts.
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Avantika Varma, MD

  • BA Degree: Place: Kasturba Medical College, 2009
  • MD Degree: Place: American University of Antigua, 2013
  • Special Interest: Primary care, hospitalist medicine, preventive medicine, underserved populations, international medicine
  • Outside Interest: Dancing, traveling, photography, listening to music
Mount Carmel Residents discuss why they chose Mount Carmel over other Columbus, Ohio, healthcare systems for their residency.

First Year Residents

Thomas Cowan, MD, is a family medicine resident at Mount Carmel St. Ann's

Thomas Cowan, MD

  • BS: University of Southern California, 2002
  • MS: Case Western Reserve University, 2007
  • MD: Case Western Reserve University, 2011
  • Special Interest: Family Medicine, Neuroscience, Biomedical Engineering
  • Outside Interest: Dining Out, Jogging, Watching NetFlix, Comedy
Cassandra Heller, DO, is a family medicine resident at Mount Carmel St. Ann's

Cassandra Heller, DO

  • DO: West Virginia School of Osteopathic Medicine, 2012
  • Special Interest: Rural Medicine and Primary Care
  • Outside Interest: Vegetarian Cooking, Reading Non Fiction, Running, Walking my Pekingese, Watching Horror Movies
Sarah Johnson, DO, is a family medicine resident at Mount Carmel St. Ann's.

Sarah Johnson, DO

  • BA: The Ohio State University, 2006
  • MA: The Ohio State University, 2009
  • MD: Ohio University Heritage College of Osteopathic Medicine, 2014
  • Outside Interest: Painting, Visiting Art and History Museums, Spending Time with my Husband and my Puppies (Toby and Molly)
Bo Na Lee, MD, is a family medicine resident at Mount Carmel St. Ann's.

Bo Na Lee, MD

  • BS: The Pennsylvania State University, 2008
  • MD: American University of Antigua, 2013
  • Special Interest: Geriatrics, Women's Health, Diabetes
Ryan Meller, MD, is a family medicine resident at Mount Carmel St. Ann's.

Ryan Meller, MD

  • AA: Lake Tahoe Community College, 2005
  • BS: Liberal Arts and Natural Science, 2008
  • MD: American University of Antigua, 2013
  • Special Interest: Emergency medicine, Urgent Care, Procedures, Preventative Medicine and Nutrition, and Critical Care.
  • Outside Interest: Rock Climbing, Swimming, Sailing, Water Skiing, Backpacking, Hiking, Playing the Piano and Guitar, Technical Decompression, Scuba Diving, ParaSailing, Snowboarding, Snow Skiing. Amongst many other outdoor activities, I enjoy learning new things, going to church and spending time with my wife.
Stephanie Ong Meller, MD, is a family medicine resident at Mount Carmel St. Ann's.

Stephanie Ong Meller, MD

  • BA: The Master's College, 2008
  • MD: American University of Antigua, 2014
  • Special Interest: Outpatient Clinics, Medical Research Clinical Trials
  • Outside Interest: Running, Sports Activities, Playing the Violin, Singing; and Spending Time with my Husband, Family and Friends.
©  2014  

Mount Carmel Health System  |  Columbus, Ohio

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