NPI Central

Sildenafil (Viagra, Revatio) Prescribers in Montana

Ranked by documented Medicare Part D claim volume (2024).

13 providers in Montana have Medicare Part D claims for sildenafil. Ordering reflects documented Part D claim volume — a transparency signal, not a quality or "best" ranking. Open any provider for their full profile and what they prescribe under Medicare.

Prescribers in MT
13
Data year
2024
Registry vintage
June 2026

sildenafil prescribers in Montana

Ranked by Part D claim volume.
  1. 1
    William HullDO

    Interventional Cardiology Physician · Butte, MT

    27 Medicare Part D claims (2024)

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  2. 2
    Vernon JohnsonMD

    Family Medicine Physician · Billings, MT

    22 Medicare Part D claims (2024)

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  3. 3
    Gregory LemenseMD

    Pulmonary Disease Physician · Bozeman, MT

    18 Medicare Part D claims (2024)

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  4. 4
    Timothy ObermillerM.D.

    Pulmonary Disease Physician · Kalispell, MT

    17 Medicare Part D claims (2024)

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  5. 5
    Ryan NahapetianMD, MPH

    Pulmonary Disease Physician · Missoula, MT

    17 Medicare Part D claims (2024)

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  6. 6
    Theodore MailletteMD

    Family Medicine Physician · Kalispell, MT

    16 Medicare Part D claims (2024)

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  7. 7
    Lisa CadwellM.D.

    Family Medicine Physician · Great Falls, MT

    15 Medicare Part D claims (2024)

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  8. 8
    Larry SeveraMD

    Family Medicine Physician · Billings, MT

    14 Medicare Part D claims (2024)

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  9. 9
    Edward MaltersMD

    Internal Medicine Physician · Billings, MT

    14 Medicare Part D claims (2024)

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  10. 10
    Zachary HalgrenFNP-C

    Family Nurse Practitioner · Billings, MT

    13 Medicare Part D claims (2024)

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  11. 11
    Robert JohnsonD.O.

    Family Medicine Physician · Helena, MT

    12 Medicare Part D claims (2024)

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  12. 12
    Roger PaffordM.D.

    Adult Medicine Physician · Anaconda, MT

    12 Medicare Part D claims (2024)

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  13. 13
    Vineeth KumarM.D.

    Pulmonary Disease Physician · Billings, MT

    11 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 sildenafil. Source: CMS NPPES (June 2026).