John Hong, MDKristina M. Seeger, MDMazer R. Ally, MDMichael Shim, MDThomas C. Krol, MDJavaid Shad, MDChristopher Devereaux, MDHellen Chiao, MDMatthew Eric Viernes, MDMark Y. Johnson, MD

John Hong, MD

John J. Hong, M.D. Earned his medical degree at the University of Miami School of Medicine in Florida. Following graduation he completed his internship and residency training in internal medicine at the University of California Irvine Medical Center. He then completed his Gastroenterology fellowship at the University of Chicago Hospitals & Pritzker School of Medicine.…
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Kristina M. Seeger, MD

Dr. Kristina Seeger earned her medical degree from Florida State University. Following graduation, she completed her internal medicine residency training at the Mayo Clinic in Jacksonville, Florida. She subsequently completed her Gastroenterology fellowship training at Scripps Green Hospital in La Jolla, California. Dr. Seeger is an active researcher, authoring and presenting work on a wide…
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Mazer R. Ally, MD

Dr. Mazer Ally earned his Medical Doctor degree from The George Washington University.  After graduation, he was commissioned into the United States Army and completed his Internal Medicine Residency at Walter Reed Army Medical Center in Washington, DC.  He completed his Gastroenterology Fellowship at the Walter Reed National Military Medical Center in Bethesda, MD. He…
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Michael Shim, MD

Dr. Michael Shim, MD is a Gastroenterology Specialist in Oceanside, CA and has over 19 years of experience in the medical field. Dr. Shim has more experience with Esophageal Disorders than other specialists in his area. He graduated from New York University School Of Medicine medical school in 2001. He is affiliated with Scripps Memorial…
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Thomas C. Krol, MD

Dr. Thomas Krol, MD is a Gastroenterology Specialist in Oceanside, CA. Dr. Krol has more experience with Anal & Rectal Disorders, Gastrointestinal Disorders, and Esophageal Disorders than other specialists in his area. He is affiliated with Scripps Memorial Hospital Encinitas.
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Javaid Shad, MD

Dr. Javaid Shad, MD is a Gastroenterology Specialist in Oceanside, CA. Dr. Shad has more experience with Esophageal Disorders, Anal & Rectal Disorders, and Gastrointestinal Disorders than other specialists in his area. He has been in practice for more than 20 years.
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Mark Y. Johnson, MD

Dr. Mark Johnson received his undergraduate degree from the University of Washington.  He attended medical school at George Washington University. Dr. Johnson then completed his residency in internal medicine at LAC-USC Medical Center; in addition he was a chief resident there.  His postgraduate training continued at the University of California at Irvine with the completion…
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