NPI Central

Levothyroxine (Synthroid, Levoxyl) Prescribers in California

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

28,796 providers in California have Medicare Part D claims for levothyroxine. 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 CA
28,796
Data year
2024
Registry vintage
June 2026

levothyroxine prescribers in California

Ranked by Part D claim volume.
  1. 1

    Internal Medicine Physician · Fresno, CA

    4,303 Medicare Part D claims (2024)

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  2. 2

    Endocrinology, Diabetes & Metabolism Physician · Los Angeles, CA

    3,829 Medicare Part D claims (2024)

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  3. 3

    Endocrinology, Diabetes & Metabolism Physician · San Dimas, CA

    2,659 Medicare Part D claims (2024)

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  4. 4

    Family Medicine Physician · Glendale, CA

    2,616 Medicare Part D claims (2024)

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  5. 5
    Abbas HasnainM.D., J.D.

    Internal Medicine Physician · Fresno, CA

    2,562 Medicare Part D claims (2024)

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  6. 6

    Endocrinology, Diabetes & Metabolism Physician · Glendale, CA

    2,245 Medicare Part D claims (2024)

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  7. 7

    Endocrinology, Diabetes & Metabolism Physician · Redding, CA

    2,236 Medicare Part D claims (2024)

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  8. 8

    Endocrinology, Diabetes & Metabolism Physician · Hanford, CA

    2,204 Medicare Part D claims (2024)

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  9. 9

    Endocrinology, Diabetes & Metabolism Physician · Glendale, CA

    2,004 Medicare Part D claims (2024)

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  10. 10

    Specialist · Lancaster, CA

    1,997 Medicare Part D claims (2024)

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  11. 11

    Internal Medicine Physician · Los Angeles, CA

    1,996 Medicare Part D claims (2024)

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  12. 12

    Endocrinology, Diabetes & Metabolism Physician · Rancho Mirage, CA

    1,984 Medicare Part D claims (2024)

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  13. 13

    Internal Medicine Physician · Stockton, CA

    1,953 Medicare Part D claims (2024)

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  14. 14

    Specialist · Beverly Hills, CA

    1,941 Medicare Part D claims (2024)

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  15. 15

    Surgery Physician · Visalia, CA

    1,932 Medicare Part D claims (2024)

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  16. 16

    Family Medicine Physician · Bakersfield, CA

    1,899 Medicare Part D claims (2024)

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  17. 17

    Internal Medicine Physician · Fairfield, CA

    1,862 Medicare Part D claims (2024)

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  18. 18

    Family Medicine Physician · Colusa, CA

    1,689 Medicare Part D claims (2024)

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  19. 19

    Endocrinology, Diabetes & Metabolism Physician · San Francisco, CA

    1,684 Medicare Part D claims (2024)

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  20. 20

    Family Medicine Physician · Glendale, CA

    1,668 Medicare Part D claims (2024)

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  21. 21

    Internal Medicine Physician · Fresno, CA

    1,655 Medicare Part D claims (2024)

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  22. 22

    Internal Medicine Physician · Visalia, CA

    1,646 Medicare Part D claims (2024)

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  23. 23

    Endocrinology, Diabetes & Metabolism Physician · San Jose, CA

    1,608 Medicare Part D claims (2024)

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  24. 24

    Internal Medicine Physician · Los Angeles, CA

    1,589 Medicare Part D claims (2024)

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  25. 25

    Nephrology Physician · Bakersfield, CA

    1,584 Medicare Part D claims (2024)

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  26. 26

    Internal Medicine Physician · Hanford, CA

    1,572 Medicare Part D claims (2024)

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  27. 27

    Endocrinology, Diabetes & Metabolism Physician · San Gabriel, CA

    1,565 Medicare Part D claims (2024)

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  28. 28

    Geriatric Medicine (Family Medicine) Physician · Long Beach, CA

    1,540 Medicare Part D claims (2024)

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  29. 29

    Endocrinology, Diabetes & Metabolism Physician · Santa Barbara, CA

    1,533 Medicare Part D claims (2024)

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  30. 30

    Geriatric Medicine (Internal Medicine) Physician · La Mesa, CA

    1,530 Medicare Part D claims (2024)

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  31. 31

    Endocrinology, Diabetes & Metabolism Physician · Fullerton, CA

    1,527 Medicare Part D claims (2024)

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  32. 32

    Cardiovascular Disease Physician · Glendale, CA

    1,523 Medicare Part D claims (2024)

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  33. 33

    Family Medicine Physician · Lake Forest, CA

    1,512 Medicare Part D claims (2024)

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  34. 34

    Family Medicine Physician · Glendale, CA

    1,511 Medicare Part D claims (2024)

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  35. 35

    Endocrinology, Diabetes & Metabolism Physician · Modesto, CA

    1,507 Medicare Part D claims (2024)

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  36. 36

    Endocrinology, Diabetes & Metabolism Physician · Los Gatos, CA

    1,502 Medicare Part D claims (2024)

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  37. 37

    Clinical Cardiac Electrophysiology Physician · Glendale, CA

    1,499 Medicare Part D claims (2024)

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  38. 38

    Internal Medicine Physician · Live Oak, CA

    1,498 Medicare Part D claims (2024)

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  39. 39

    Endocrinology, Diabetes & Metabolism Physician · Long Beach, CA

    1,496 Medicare Part D claims (2024)

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  40. 40

    Internal Medicine Physician · Bakersfield, CA

    1,491 Medicare Part D claims (2024)

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  41. 41

    Endocrinology, Diabetes & Metabolism Physician · Temecula, CA

    1,491 Medicare Part D claims (2024)

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  42. 42

    Internal Medicine Physician · San Diego, CA

    1,477 Medicare Part D claims (2024)

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  43. 43
    Arjun VarmaPHARM. D.

    Pharmacist · San Francisco, CA

    1,469 Medicare Part D claims (2024)

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  44. 44

    Endocrinology, Diabetes & Metabolism Physician · Fairfield, CA

    1,445 Medicare Part D claims (2024)

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  45. 45

    Family Medicine Physician · Glendale, CA

    1,439 Medicare Part D claims (2024)

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  46. 46

    Emergency Medical Services (Emergency Medicine) Physician · Alpine, CA

    1,431 Medicare Part D claims (2024)

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  47. 47

    Family Medicine Physician · El Centro, CA

    1,426 Medicare Part D claims (2024)

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  48. 48

    Family Medicine Physician · Van Nuys, CA

    1,423 Medicare Part D claims (2024)

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  49. 49

    Specialist · Glendale, CA

    1,417 Medicare Part D claims (2024)

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  50. 50

    Internal Medicine Physician · Madera, CA

    1,405 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 levothyroxine. Source: CMS NPPES (June 2026).