Metformin (Glucophage, Fortamet) Prescribers in Oregon

1. 1
   Christopher MorrisM.D.

   Internal Medicine Physician · Beaverton, OR

   949 Medicare Part D claims (2024)

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2. 2
   Thanhlong PhamMD

   Family Medicine Physician · Portland, OR

   842 Medicare Part D claims (2024)

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3. 3
   David LarsonMD

   Internal Medicine Physician · Beaverton, OR

   808 Medicare Part D claims (2024)

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4. 4
   Richard KimaniM.D.

   Internal Medicine Physician · Mcminnville, OR

   709 Medicare Part D claims (2024)

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5. 5
   Nita VellodyDO

   Internal Medicine Physician · Springfield, OR

   622 Medicare Part D claims (2024)

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6. 6
   John AllenM.D.

   Internal Medicine Physician · Bend, OR

   618 Medicare Part D claims (2024)

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7. 7
   Michael HarrisM.D.

   Internal Medicine Physician · Bend, OR

   606 Medicare Part D claims (2024)

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8. 8
   Medha ChunduruMD

   Family Medicine Physician · Beaverton, OR

   600 Medicare Part D claims (2024)

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9. 9
   Jonas OltmanD.O.

   Family Medicine Physician · Hermiston, OR

   560 Medicare Part D claims (2024)

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10. 10
    Brian BedollaMD

    Family Medicine Physician · Woodburn, OR

    553 Medicare Part D claims (2024)

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11. 11
    Jon HughesMD PC

    Internal Medicine Physician · Salem, OR

    549 Medicare Part D claims (2024)

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12. 12
    Shugang GeMD

    Internal Medicine Physician · Portland, OR

    541 Medicare Part D claims (2024)

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13. 13
    Mary CarrollM.D.

    Endocrinology, Diabetes & Metabolism Physician · Bend, OR

    536 Medicare Part D claims (2024)

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14. 14
    William GillespieM.D.

    Internal Medicine Physician · Salem, OR

    530 Medicare Part D claims (2024)

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15. 15
    Jon WinjumMD

    Family Medicine Physician · Oregon City, OR

    503 Medicare Part D claims (2024)

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16. 16
    Kimberly FlowersANP

    Gerontology Nurse Practitioner · Portland, OR

    497 Medicare Part D claims (2024)

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17. 17
    Tonya KoopmanNP

    Family Nurse Practitioner · Bend, OR

    494 Medicare Part D claims (2024)

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18. 18
    Andrea OsterlundDO

    Internal Medicine Physician · Clackamas, OR

    494 Medicare Part D claims (2024)

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19. 19
    Robert SaldivarM.D.

    Family Medicine Physician · Beaverton, OR

    486 Medicare Part D claims (2024)

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20. 20
    Neil BlairM.D.

    Internal Medicine Physician · Hillsboro, OR

    481 Medicare Part D claims (2024)

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21. 21
    Jeffrey SyMD

    Internal Medicine Physician · Hillsboro, OR

    474 Medicare Part D claims (2024)

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22. 22
    Alba SchultzNP

    Family Nurse Practitioner · Eugene, OR

    469 Medicare Part D claims (2024)

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23. 23
    Gregory LackidesM.D.

    Internal Medicine Physician · Salem, OR

    463 Medicare Part D claims (2024)

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24. 24
    Kai LiMD

    Internal Medicine Physician · Oregon City, OR

    461 Medicare Part D claims (2024)

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25. 25
    Niels PedersenMD

    Family Medicine Physician · Salem, OR

    460 Medicare Part D claims (2024)

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26. 26
    James WebbDO

    Family Medicine Physician · Gresham, OR

    455 Medicare Part D claims (2024)

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27. 27
    Shelli FlynnMD

    Family Medicine Physician · Eugene, OR

    448 Medicare Part D claims (2024)

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28. 28
    Mark WozniakMD

    Internal Medicine Physician · Clackamas, OR

    448 Medicare Part D claims (2024)

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29. 29
    David ShensonMD

    Internal Medicine Physician · Clackamas, OR

    437 Medicare Part D claims (2024)

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30. 30
    James NeifingMD

    Endocrinology, Diabetes & Metabolism Physician · Portland, OR

    434 Medicare Part D claims (2024)

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31. 31
    Patrick HungerfordM.D.

    Endocrinology, Diabetes & Metabolism Physician · Medford, OR

    434 Medicare Part D claims (2024)

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32. 32
    Jason PhillipsM.D.

    Internal Medicine Physician · Salem, OR

    430 Medicare Part D claims (2024)

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33. 33
    Daniel TamashiroM.D.

    Internal Medicine Physician · Clackamas, OR

    428 Medicare Part D claims (2024)

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34. 34
    Anna MarinaM.D.

    Endocrinology, Diabetes & Metabolism Physician · Astoria, OR

    424 Medicare Part D claims (2024)

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35. 35
    Gary BrandtMD

    Family Medicine Physician · Eugene, OR

    424 Medicare Part D claims (2024)

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36. 36
    Michael CarrollMD

    Internal Medicine Physician · Portland, OR

    423 Medicare Part D claims (2024)

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37. 37
    Emily PfaffPA

    Medical Physician Assistant · Florence, OR

    422 Medicare Part D claims (2024)

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38. 38
    Jarred McateerMD

    Internal Medicine Physician · Portland, OR

    416 Medicare Part D claims (2024)

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39. 39
    Brian CurtisM.D.

    Internal Medicine Physician · Corvallis, OR

    415 Medicare Part D claims (2024)

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40. 40
    William BrusM.D.

    Family Medicine Physician · Eugene, OR

    415 Medicare Part D claims (2024)

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41. 41
    Richard SegalMD PC

    Internal Medicine Physician · Salem, OR

    414 Medicare Part D claims (2024)

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42. 42
    Robert WendlandMD

    Internal Medicine Physician · Tualatin, OR

    410 Medicare Part D claims (2024)

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43. 43
    Lucy OrtegaP.A.

    Medical Physician Assistant · Medford, OR

    407 Medicare Part D claims (2024)

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44. 44
    Todd WinterMD

    Internal Medicine Physician · Medford, OR

    404 Medicare Part D claims (2024)

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45. 45
    Steven YoderM.D.

    Family Medicine Physician · Eugene, OR

    397 Medicare Part D claims (2024)

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46. 46
    Lance AdamsM.D.

    Family Medicine Physician · Bend, OR

    396 Medicare Part D claims (2024)

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47. 47
    Hsiang-Sen YehM.D.

    Internal Medicine Physician · Eugene, OR

    394 Medicare Part D claims (2024)

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48. 48
    Yien ChiongM.D

    Endocrinology, Diabetes & Metabolism Physician · Springfield, OR

    392 Medicare Part D claims (2024)

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49. 49
    Samuel FellinDO

    Internal Medicine Physician · Tigard, OR

    387 Medicare Part D claims (2024)

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50. 50
    Thuyet TranM.D.

    Internal Medicine Physician · Damascus, OR

    384 Medicare Part D claims (2024)

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Medicare Part D only. Counts and ordering reflect Medicare Part D claims (2024) from CMS — they exclude cash-pay, commercial, and Medicaid prescriptions and undercount cash-pay categories (e.g. GLP-1 weight-loss, testosterone). Not a quality or "best" ranking. Absence does not mean a provider does not prescribe metformin. Source: CMS NPPES (June 2026).