Verified 2026 Physician Ranking

Top Gastroenterologists in Colorado, 2026

Published by Palm Beach County Medical Media Group · Last updated April 30, 2026

PBCMMG Excellence Certified \u2014 Recognizing Excellence in Healthcare

How this ranking was built: We applied PBCMMG's seven weighted criteria (board certification, years in active practice, disciplinary record, aggregate patient reviews, hospital affiliations, specialty training, peer recognition) to every gastroenterology physician with active credentialing in Colorado. Sources: NPPES Registry, ABMS, state medical boards, aggregated public review data. Last reviewed April 2026.

  1. #1

    Sahibzada Shah, MD

    GastroenterologyVirginia, VA21+ years in practice

    Sahibzada Shah, MD, practices gastroenterology in Virginia, VA. NPI-verified active practice since 2005.

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  2. #2

    Gareth Weiner, MD

    GastroenterologyColorado, CO20+ years in practice

    Gareth Weiner, MD, practices gastroenterology in Colorado, CO. NPI-verified active practice since 2006.

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  3. #3

    Mary Kovalak, MD

    GastroenterologyColorado, CO20+ years in practice

    Mary Kovalak, MD, practices gastroenterology in Colorado, CO. NPI-verified active practice since 2006.

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  4. #4

    Robert Reveille, MD

    GastroenterologyColorado, CO20+ years in practice

    Robert Reveille, MD, practices gastroenterology in Colorado, CO. NPI-verified active practice since 2006.

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  5. #5

    Veronika Panah, MD

    GastroenterologyTexas, TX19+ years in practice

    Veronika Panah, MD, practices gastroenterology in Texas, TX. NPI-verified active practice since 2007.

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  6. #6

    Christopher Calcagno, DO

    Addiction MedicineColorado, CO18+ years in practice

    Christopher Calcagno, DO, practices addiction medicine in Colorado, CO. NPI-verified active practice since 2008.

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  7. #7

    James Higham-Kessler, MD

    GastroenterologyColorado, CO15+ years in practice

    James Higham-Kessler, MD, practices gastroenterology in Colorado, CO. NPI-verified active practice since 2011.

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  8. #8

    Matthew Seto, DO

    GastroenterologyColorado, CO14+ years in practice

    Matthew Seto, DO, practices gastroenterology in Colorado, CO. NPI-verified active practice since 2012.

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  9. #9

    Michael Burkholz, DO

    Addiction MedicineColorado, CO12+ years in practice

    Michael Burkholz, DO, practices addiction medicine in Colorado, CO. NPI-verified active practice since 2014.

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