Gastroenterology
Joyce M. Koh, MD
Montgomery Gastroenterology
Dr. Joyce M. Koh is a board-certified gastroenterologist at Montgomery Gastroenterology in Silver Spring, MD, certified by the American Board of Internal Medicine in both internal medicine and gastroenterology. She cares for adults with the full range of digestive and liver concerns.
Background and training
Dr. Koh graduated with high honors from Harvard College before earning her medical degree from the Pennsylvania State University College of Medicine. She completed her internal medicine residency at Johns Hopkins Bayview Medical Center and her gastroenterology fellowship at the Johns Hopkins University School of Medicine in Baltimore.
Why patients choose Dr. Koh
Patients consistently describe Dr. Koh as thorough and compassionate — reflected in a 4.91-star Zocdoc rating across 113 reviews, including a 4.95 out of 5 score for bedside manner. Her Johns Hopkins training and careful, patient-first style make her a strong choice for anything from a routine screening colonoscopy to the workup of complex digestive symptoms.
Practice focus
Colon cancer screening and colonoscopy, acid reflux and GERD, abdominal pain, and general gastroenterology and digestive care.
Languages and access
Dr. Koh sees patients in English at Montgomery Gastroenterology in Silver Spring. Confirm procedure location, prep instructions, and insurance coverage with the office before scheduling.
Profile last fact-checked July 1, 2026. Information reflects publicly available sources and may change. Confirm details directly with the practice before booking.
How Dr. Koh compares
Context from the 139 providers we track across Bethesda and Montgomery County.
The only one we list in Silver Spring
The only gastroenterology provider in our registry serving Silver Spring.
The only provider we list offering colonoscopy
1 of the 130 providers who list their focus areas name colonoscopy.
The only Penn State College of Medicine graduate we list
1 of the 107 doctors whose medical school we record studied at Penn State College of Medicine.
Trained in the DC–Baltimore area
Completed residency locally, like 32% of the 87 doctors whose residency we record.
Medical school: Penn State College of Medicine — Hershey, PA, United States.
Figures describe the 139 providers currently in the MyBethesdaDoctor registry as of August 2026 — a curated directory, not a census of every doctor in Montgomery County. How we build this list.
Where Dr. Koh sits by experience
Dr. Koh finished medical school in 2008, 18 years ago. Of the 135 providers in our registry whose graduation year we could verify, 103 finished earlier, 27 finished later, and 4 finished the same year.
1965–69
1 provider finished 1965–19691970–74
2 providers finished 1970–19741975–79
4 providers finished 1975–19791980–84
13 providers finished 1980–19841985–89
12 providers finished 1985–19891990–94
14 providers finished 1990–19941995–99
27 providers finished 1995–19992000–04
20 providers finished 2000–2004Dr. Koh2008
2005–09
19 providers finished 2005–20092010–14
17 providers finished 2010–20142015–19
4 providers finished 2015–20192020–24
2 providers finished 2020–2024Among the 110 physicians we list, 90 finished medical school earlier — the median for that group is 1998.
All 12 bands
| Graduated | Providers |
|---|---|
| 1965–1969 | 1 |
| 1970–1974 | 2 |
| 1975–1979 | 4 |
| 1980–1984 | 13 |
| 1985–1989 | 12 |
| 1990–1994 | 14 |
| 1995–1999 | 27 |
| 2000–2004 | 20 |
| 2005–2009 — Dr. Koh | 19 |
| 2010–2014 | 17 |
| 2015–2019 | 4 |
| 2020–2024 | 2 |
Figures describe the 139 providers currently in the MyBethesdaDoctor registry as of August 2026 — a curated directory, not a census of every doctor in Montgomery County. Based on the 135 of 139 profiles with a graduation year we could verify against a primary source; the remaining 4 are left out rather than estimated. How we build this list.
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