Gastroenterology Physician in New Hampshire

Compiled from official public sources by the PlainDoctor editorial team.

91 providers - Page 2 of 2

The CMS National Plan and Provider Enumeration System currently lists 91 Gastroenterology Physician providers with a primary practice address in New Hampshire, all registered under the Internal Medicine NUCC taxonomy branch. Each clinician on this roster selected Gastroenterology Physician as their primary taxonomy at NPI enrollment, a self-reported classification that is updated whenever the provider files a correction with CMS. The count excludes organizations (group practices, hospitals, clinics operate under separate NPIs) and excludes providers who chose a different primary specialty even if they practice Gastroenterology Physician part-time. Every figure is drawn from the federal National Provider Identifier Registry (CMS NPPES) - more than 7 million providers, maintained since May 2007, with 2023 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.

At 91 enrolled providers, Gastroenterology Physician in New Hampshire is a limited-supply market, that matters for search-radius decisions, because patients in New Hampshire outside the largest metros often need to broaden to adjacent cities to find a local Gastroenterology Physician clinician. The directory below is paginated 50 providers at a time (2 pages total) and is sorted alphabetically by last name, so scanning for a specific practice usually goes faster than scrolling; on the provider detail page you'll find the full NPPES record including address, phone, credentials, and any published Medicare Part D prescribing activity for 2023.

Before contacting anyone on this list, verify the practice is still at the address shown, NPPES refreshes monthly, but providers who have relocated, retired, or changed employers may not have filed an NPI update yet. Important: PlainDoctor is a directory of publicly available CMS government data covering Gastroenterology Physician providers in New Hampshire, not a quality ranking, a board-certification verifier, or medical advice. Always confirm credentials through the NPPES NPI Registry, the New Hampshire medical board, and, where relevant, the ABMS, AOA, or the specialty's primary certifying body before making any clinical decision. Nothing on this page substitutes for a conversation with a licensed clinician.

Which cities have the most Gastroenterology Physician in New Hampshire

Provider concentration by primary practice city. Bars sized to Lebanon = 100%.

Lebanon
20
Manchester
16
Concord
11
Nashua
10
Somersworth
7
Mark Mallek, M.D.
Gastroenterology Physician
Nashua, NH 03060
(603) 881-8000
Leon McLean, MD
Gastroenterology Physician
Derry, NH 03038
(603) 432-8802
John Meadows, M.D.
Gastroenterology Physician
Concord, NH 03301
(603) 228-1763
Trinh Meyer, M.D.
Gastroenterology Physician
Manchester, NH 03104
(603) 695-2500
Howard Mitz, D.O.
Gastroenterology Physician
Littleton, NH 03561
(603) 444-0272
Khushboo Munot, MD
Gastroenterology Physician
Portsmouth, NH 03801
(603) 692-2228
Michael Murphy, MD
Gastroenterology Physician
Manchester, NH 03102
(603) 624-6978
Srikrishna Nagri, M.D
Gastroenterology Physician
Nashua, NH 03063
(603) 577-4000
Scott Oosterveen, MD
Gastroenterology Physician
Concord, NH 03301
(603) 228-1763
Siddhartha Parker, M.D.
Gastroenterology Physician
Lebanon, NH 03756
(603) 650-5261
Melanie Pascal, MD
Gastroenterology Physician
Exeter, NH 03833
(603) 775-5528
Soumil Patwardhan, M.D.
Gastroenterology Physician
Portsmouth, NH 03801
(603) 692-2228
Daniel Rath, M.D.
Gastroenterology Physician
Keene, NH 03431
(603) 354-5400
Raja Rehman, M.D.
Gastroenterology Physician
Salem, NH 03079
(603) 898-5082
Knut Roalsvig, MD
Gastroenterology Physician
Derry, NH 03038
(603) 432-8802
Douglas Robertson, M.D.
Gastroenterology Physician
Lebanon, NH 03756
(603) 653-9450
Richard Rothstein, MD
Gastroenterology Physician
Lebanon, NH 03756
(603) 650-5217
Johann Rothwangl, M.D
Gastroenterology Physician
Manchester, NH 03104
(603) 624-4366
David Sack, MD
Gastroenterology Physician
Manchester, NH 03104
(603) 695-2500
Timothy Scherer, M.D.
Gastroenterology Physician
Manchester, NH 03104
(603) 695-2500
Thomas Sherman, MD
Gastroenterology Physician
Exeter, NH 03833
(603) 772-5528
Lawton Shick, M.D.
Gastroenterology Physician
Manchester, NH 03104
(603) 695-2500
Corey Siegel, M.D.
Gastroenterology Physician
Lebanon, NH 03756
(603) 650-8101
Mark Silversmith, M.D.
Gastroenterology Physician
Bedford, NH 03110
(603) 624-4450
Samrath Singh, M.D.
Gastroenterology Physician
Concord, NH 03301
(603) 228-1763
Frederick Spin, M.D.
Gastroenterology Physician
Keene, NH 03431
(603) 354-5454
Shelby Sullivan, MD
Gastroenterology Physician
Lebanon, NH 03756
(603) 650-5000
Umer Syed
Gastroenterology Physician
Nashua, NH 03060
(603) 578-9363
Steven Taylor, MD
Gastroenterology Physician
Derry, NH 03038
(603) 432-8802
Robert Thomson, MD
Gastroenterology Physician
Concord, NH 03301
(603) 228-1763
Annette Tobar, MD
Gastroenterology Physician
Nashua, NH 03060
(603) 577-5355
Hillary Tompkins, MD
Gastroenterology Physician
Exeter, NH 03833
(603) 772-5528
Arifa Toor, MD
Gastroenterology Physician
Lebanon, NH 03756
(603) 650-5602
Lauren Tormey, M.D.
Gastroenterology Physician
Lebanon, NH 03756
(603) 650-5261
Otto Trinkl, M.D.
Gastroenterology Physician
Keene, NH 03431
(603) 354-5454
Steven Tsistrakis, M.D
Gastroenterology Physician
Derry, NH 03038
(603) 432-8802
Stephen Wiener, M.D.
Gastroenterology Physician
Manchester, NH 03101
(603) 314-6900
Michael Winter, MD
Gastroenterology Physician
Lebanon, NH 03756
(603) 650-5261
Jassir Witta, M.D.
Gastroenterology Physician
Nashua, NH 03060
(603) 577-5355
Melissa Worth, APRN
Gastroenterology Physician
Manchester, NH 03104
(603) 695-2840
Liam Zakko, M.D.
Gastroenterology Physician
Lebanon, NH 03756
(603) 650-5261

Gastroenterology Physician in Other States

Top states for Gastroenterology Physician by CMS NPPES enrollment, use these to widen your search radius.

Compare Gastroenterology Physician vs another specialty โ†’

Provider data from CMS NPPES (download.cms.gov/nppes). Specialty classification from NUCC Health Care Provider Taxonomy (nucc.org). Each provider is identified by NPI. PlainDoctor does not rate or rank providers. Methodology ยท About

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-05-20.