NPPES file of Aug 9, 2026

Internal Medicine Physician in California

17,696 NPPES records list internal medicine physician with a practice address in California, 45 per 100,000 residents, the 17th highest rate of 51. Los Angeles and San Francisco have the most; each record links to the provider's NPI and the California license search. Page 205 of 354.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207R00000X · method

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Los Angeles has the most, 1,423

  1. Los Angeles1,423
  2. San Francisco1,318
  3. San Diego961
  4. Sacramento601
  5. Oakland432

Internal Medicine Physician records in California

  1. Sandra Mendel, M.D.Santa Cruz, CA 950621538261011
  2. John Mendelson, MDSan Francisco, CA 941091891889341
  3. Terrie Mendelson, M.D.San Francisco, CA 941171871647347
  4. Deborah Mendenhall, MDLos Angeles, CA 900731730261629
  5. Alegra Mendez, MDSan Francisco, CA 941091669121265
  6. Carmen Mendez, M.D.Torrance, CA 905091609073618
  7. Eric MendezSan Diego, CA 921031528599230
  8. Viviana Mendez, MDSan Jose, CA 951281659833077
  9. Ruperto Mendiones, MDFontana, CA 923351437207396
  10. Brian MendozaOrange, CA 928681316444946
  11. Joann Mendoza, MDPanorama City, CA 914021114010543
  12. Linda Mendoza, MDChico, CA 959261689631772
  13. Oscar Mendoza RamosLos Angeles, CA 900221336953728
  14. Sergio Mendoza Sida, MDWoodland Hills, CA 913671255511804
  15. Angel Mendoza-GonzalezOakland, CA 946121134625676
  16. Anne Meneghetti, M.D.San Francisco, CA 941051184821241
  17. Bambi Menes, MDSouth San Francisco, CA 940801144394446
  18. Jane-Yi Meng, M.D.Mountain View, CA 940401821045774
  19. Lingjin MengSanta Rosa, CA 954031730574575
  20. William Meng, DOMountain View, CA 940401215380670
  21. Rashmi Menon, M.D.Torrance, CA 905021407053416
  22. Rishi Menon, MDRoseville, CA 956611639375967
  23. Anitha Menon Vinodkumar, MDSan Francisco, CA 941431285262857
  24. Ramonchito Menor, M.D.Porterville, CA 932571942385505
  25. Ricky Menor, MDLos Angeles, CA 900341922175801
  26. John MenseTorrance, CA 905051588051171
  27. Francoise Menteer, MDThousand Oaks, CA 913601114939006
  28. Pamela Mercado, D.O.Rocklin, CA 956771255595351
  29. Alex Mercandetti, M.D.San Diego, CA 921031588691455
  30. Teresa Merced, MDLos Angeles, CA 900671083645550
  31. Ovid Mercene, MDLos Angeles, CA 900571770686354
  32. Karim Merchant, MDBakersfield, CA 933061851852354
  33. Daniel Merck, MDAuburn, CA 956031750300067
  34. Ellen Merenbach, MDSanta Rosa, CA 954031578635306
  35. Richard Merino, MDPoway, CA 920641174628317
  36. Kevin Merkes, MDPoway, CA 920641760578744
  37. Venkat Merla, M.D.Bakersfield, CA 933071366719023
  38. Shayli MerloSolvang, CA 934631619342854
  39. Patrick Merrill, MDRiverside, CA 925051952460545
  40. James Merrin, M.D.Northridge, CA 913301922097138
  41. Swapna Merupula, M.B.,B.S.Oakland, CA 946091942644299
  42. Peyman Mesbah Oskui, MDMission Hills, CA 913451154610897
  43. Megan Mescher-Cox, D.O.Oxnard, CA 930361962794578
  44. Leslie Meserve, M.D.Newport Beach, CA 926601033144605
  45. Gity Meshkat Razavi, MD,Menlo Park, CA 940251306473657
  46. Matthew Mesias, M.D.Stanford, CA 943051467792721
  47. Babji Mesipam, MDMontecito, CA 931081174519425
  48. George Messerlian, M.D.Santa Barbara, CA 931051740392513
  49. Magdi Messiha, M.D.Newport Beach, CA 926631346269370
  50. Alex Messina, MDSanta Monica, CA 904041902867823

Source: CMS NPPES, primary taxonomy 207R00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 17 of 51 per resident

  1. New Jersey50
  2. New Hampshire48
  3. Minnesota46
  4. California45
  5. Florida45
  6. Ohio45
  7. 50 states and D.C.44

Source: CMS NPPES, primary taxonomy 207R00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

79.5% of these records appear in a Medicare file, against 78.7% nationally

A Medicare file here is Part D prescribing (2024), a MIPS score (2023), an Open Payments record (2024) or Medicare group billing (CMS Doctors and Clinicians). A record outside them may still see patients: these files cover Medicare only.

  1. California79.5%
  2. United States78.7%

Internal Medicine Physician records in California, measured

  • In a Medicare file14,068 of 17,696 · 79.5% here, 78.7% nationally
  • In the CMS Doctors and Clinicians file11,077 · 62.6% here, 61.4% nationally
  • Not updated in five years or more10,832 · 61.2% here, 55.4% nationally
  • Median graduation year2004 · the 11,065 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207R00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

17,696 NPPES records list internal medicine physician (207R00000X) as their primary taxonomy with a practice address in California: 45 per 100,000 residents against 44 nationally (50 states and D.C.). Los Angeles has 1,423 of them (8%).

A record is a registration a provider made and keeps up to date: it shows neither that the provider is licensed nor that they still practice there. The state's own license search is the check.

States with a similar number

  1. New York12,067
  2. Florida10,151
  3. Texas9,175
  4. Pennsylvania7,300

States with a similar rate per 100,000

  1. Minnesota45.9
  2. Ohio44.8
  3. New Hampshire48.0
  4. Maine42.8

The largest states

  1. New York12,067
  2. Florida10,151
  3. Texas9,175
  4. Pennsylvania7,300
  5. Illinois7,238

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy; 2023 Census population estimates. A registry record is not a license.

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.