NPI Central

Upper Endoscopy (egd) Providers in Washington

Ranked by documented Medicare service volume (2024).

385 providers in Washington have Medicare claims for upper endoscopy (EGD). Ordering reflects documented Medicare service volume — a transparency signal, not a quality or "best" ranking. Open any provider for their full profile, map, and the procedures they bill Medicare.

Providers in WA
385
Data year
2024
Registry vintage
June 2026

Upper Endoscopy (egd) providers in Washington

Ranked by Medicare service volume.
  1. 1
    Digestive Disease & Endoscopy Center, LLC

    Ambulatory Surgical Clinic/Center · Silverdale, WA

    859 Medicare services (2024)

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  2. 2
    Northwest Endoscopy Center, LLC

    Ambulatory Surgical Clinic/Center · Bellingham, WA

    623 Medicare services (2024)

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  3. 3
    Gastroenterology Associates, LLC

    Ambulatory Surgical Clinic/Center · Olympia, WA

    577 Medicare services (2024)

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  4. 4
    The Polyclinic PLLC

    Ambulatory Surgical Clinic/Center · Seattle, WA

    488 Medicare services (2024)

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  5. 5
    Colin WolslegelD.O.

    Gastroenterology Physician · Port Angeles, WA

    467 Medicare services (2024)

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  6. 6
    The Vancouver Clinic Inc Ps

    Ambulatory Surgical Clinic/Center · Vancouver, WA

    448 Medicare services (2024)

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  7. 7
    Olympia Multi-Specialty Clinic Ambulatory Procedures Cntr PLLC

    Ambulatory Surgical Clinic/Center · Olympia, WA

    445 Medicare services (2024)

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  8. 8
    Puget Sound Gastroenterology, PLLC

    Ambulatory Surgical Clinic/Center · Seattle, WA

    428 Medicare services (2024)

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  9. 9
    Optum Care Washington PLLC

    Ambulatory Surgical Clinic/Center · Everett, WA

    415 Medicare services (2024)

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  10. 10
    Mid-Columbia Endoscopy Center, LLC

    Ambulatory Surgical Clinic/Center · Kennewick, WA

    397 Medicare services (2024)

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  11. 11
    Spokane Digestive Disease Center, P.s.

    Ambulatory Surgical Clinic/Center · Spokane, WA

    374 Medicare services (2024)

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  12. 12
    Western Washington Endoscopy Centers LLC

    Ambulatory Surgical Clinic/Center · Tacoma, WA

    366 Medicare services (2024)

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  13. 13
    Miguel Ordonez CastellanosMD

    Gastroenterology Physician · Spokane, WA

    323 Medicare services (2024)

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  14. 14
    The Eastside Endoscopy Center, LLC

    Ambulatory Surgical Clinic/Center · Issaquah, WA

    319 Medicare services (2024)

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  15. 15
    Gonzalo PandolfiMD

    Gastroenterology Physician · Yakima, WA

    307 Medicare services (2024)

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  16. 16
    Western Washington Endoscopy Centers LLC

    Ambulatory Surgical Clinic/Center · Puyallup, WA

    303 Medicare services (2024)

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  17. 17
    Robert LawsonM.D.

    Gastroenterology Physician · Spokane, WA

    298 Medicare services (2024)

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  18. 18
    Nicolas Villa GuillenM.D.

    Gastroenterology Physician · Spokane, WA

    297 Medicare services (2024)

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  19. 19
    Yuen YeeMD

    Gastroenterology Physician · Silverdale, WA

    295 Medicare services (2024)

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  20. 20
    Ningxin ZengMD

    Gastroenterology Physician · Kennewick, WA

    292 Medicare services (2024)

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  21. 21
    Randy GeldmacherMD

    Gastroenterology Physician · Richland, WA

    290 Medicare services (2024)

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  22. 22
    Puget Sound Gastroenterology, PLLC

    Ambulatory Surgical Clinic/Center · Kirkland, WA

    279 Medicare services (2024)

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  23. 23
    Samit DattaM.D.

    Gastroenterology Physician · Mount Vernon, WA

    257 Medicare services (2024)

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  24. 24
    Ajay PabbyMD

    Gastroenterology Physician · Spokane, WA

    251 Medicare services (2024)

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  25. 25
    The Eastside Endoscopy Center LLC

    Ambulatory Surgical Clinic/Center · Bellevue, WA

    250 Medicare services (2024)

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  26. 26
    Bryan DohertyM.D.

    Gastroenterology Physician · Silverdale, WA

    240 Medicare services (2024)

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  27. 27
    Sankar AlagugurusamyMD

    Gastroenterology Physician · Mount Vernon, WA

    226 Medicare services (2024)

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  28. 28
    Kadlec Regional Medical Center

    Ambulatory Surgical Clinic/Center · Richland, WA

    215 Medicare services (2024)

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  29. 29
    Puget Sound Gastroenterology, PLLC

    Ambulatory Surgical Clinic/Center · Kennewick, WA

    214 Medicare services (2024)

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  30. 30
    Ali GaskariMD

    Gastroenterology Physician · Spokane Valley, WA

    209 Medicare services (2024)

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  31. 31
    Owen Baldwin

    Gastroenterology Physician · Wenatchee, WA

    206 Medicare services (2024)

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  32. 32
    Western Washington Endoscopy Centers LLC

    Ambulatory Surgical Clinic/Center · Federal Way, WA

    205 Medicare services (2024)

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  33. 33
    Puget Sound Gastroenterology, PLLC

    Ambulatory Surgical Clinic/Center · Edmonds, WA

    193 Medicare services (2024)

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  34. 34
    Nazar HafizMD

    Gastroenterology Physician · Richland, WA

    188 Medicare services (2024)

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  35. 35
    Peacehealth

    Ambulatory Surgical Clinic/Center · Bellingham, WA

    186 Medicare services (2024)

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  36. 36
    Peter MaherM.D.

    Gastroenterology Physician · Richland, WA

    183 Medicare services (2024)

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  37. 37
    Narendra SiddaiahMD

    Gastroenterology Physician · Silverdale, WA

    182 Medicare services (2024)

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  38. 38
    David BayneM.D.

    Gastroenterology Physician · Port Angeles, WA

    176 Medicare services (2024)

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  39. 39
    Walla Walla Clinic, Inc.

    Ambulatory Surgical Clinic/Center · Walla Walla, WA

    174 Medicare services (2024)

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  40. 40
    Western Washington Medical Group, Inc Ps

    Ambulatory Surgical Clinic/Center · Everett, WA

    172 Medicare services (2024)

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  41. 41
    Wen-Huan HoMD

    Gastroenterology Physician · Bellingham, WA

    172 Medicare services (2024)

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  42. 42
    Rishabh GulatiMD

    Gastroenterology Physician · Silverdale, WA

    168 Medicare services (2024)

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  43. 43
    Nicholas SunD.O.

    Gastroenterology Physician · Puyallup, WA

    165 Medicare services (2024)

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  44. 44
    John KuczynskiM.D.

    Gastroenterology Physician · Olympia, WA

    165 Medicare services (2024)

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  45. 45
    Kalyan KannegantiM.D

    Gastroenterology Physician · Tacoma, WA

    162 Medicare services (2024)

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  46. 46
    Inku HwangM.D.

    Gastroenterology Physician · Wenatchee, WA

    159 Medicare services (2024)

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  47. 47
    Keaton JonesM.D.

    Gastroenterology Physician · Olympia, WA

    159 Medicare services (2024)

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  48. 48
    Yana ParkerM.D.

    Gastroenterology Physician · Silverdale, WA

    159 Medicare services (2024)

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  49. 49
    David LiangM.D.

    Gastroenterology Physician · Edmonds, WA

    157 Medicare services (2024)

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  50. 50
    Siew WongM.D.

    Gastroenterology Physician · Kennewick, WA

    155 Medicare services (2024)

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Counts and ordering reflect Medicare fee-for-service claims (2024) from the CMS Medicare Physician & Other Practitioners dataset — a 65+ subset, not all care, and not a quality, outcome, or "best" ranking. Absence from this list does not mean a provider does not perform upper endoscopy (EGD). Source: CMS NPPES (June 2026).