NPPES file of Aug 9, 2026

Allergy & Immunology Physician in California

444 NPPES records list allergy & immunology physician with a practice address in California, 1.1 per 100,000 residents, the 21st highest rate of 51. San Diego and Los Angeles have the most; each record links to the provider's NPI and the California license search. Page 7 of 9.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 207K00000X · method

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

San Diego has the most, 48

  1. San Diego48
  2. Los Angeles34
  3. San Francisco15
  4. Walnut Creek14
  5. Palo Alto13

Allergy & Immunology Physician records in California

  1. Nancy Ostrom, M.D.San Diego, CA 921231437177060
  2. Shalin Pandya, D.O.Roseville, CA 956611659759512
  3. Christine Panganiban, MD, MSFoothill Ranch, CA 926101417310558
  4. Neil Parikh, M.D.Sacramento, CA 958161952531030
  5. Dai Park, M.D.Modesto, CA 953551376744896
  6. Jane Parnes, MDStanford, CA 943051114053360
  7. Chiraag Patel, M.D.Roseville, CA 956611649426602
  8. Sonal Patel, MDPasadena, CA 911061346376894
  9. John Pauls, M.DSan Diego, CA 921011659337277
  10. Jennifer Pendleton, MDSan Diego, CA 921081821054446
  11. Karin Peterson, MD, PHDSan Diego, CA 921231780651828
  12. Maria Petrick, M.D.Santa Rosa, CA 954011396743605
  13. Timothy Pham, MDArcadia, CA 910071457549826
  14. Ami Philipp, M.D.Porter Ranch, CA 913261699040782
  15. Kristina Philpott, M.D.Fremont, CA 945381902999477
  16. Arman Pirzad, MDEureka, CA 955011346699667
  17. Cristina Porch-Curren, M.D.Camarillo, CA 930101053314724
  18. Larry Posner, MDNapa, CA 945581548271216
  19. Anna Postolova, MDMenlo Park, CA 940251932475316
  20. Bruce Prenner, MDSan Diego, CA 921081104882729
  21. James Pugely, MDEureka, CA 955011902985575
  22. Asif Rafi, M.D.Los Angeles, CA 900641265549455
  23. James Raitt, MDStanford, CA 943051932235181
  24. Courtney Ramos, D.O.San Luis Obispo, CA 934011144670217
  25. Madeleine Ramos, MDEureka, CA 955011669431318
  26. Inderpal Randhawa, M.D.Long Beach, CA 908061316035363
  27. Kamineni Rao, MDRancho Cordova, CA 956701508905688
  28. Anoshie Ratnayake, M.D.Los Angeles, CA 900331427228873
  29. Mohan ReddyMerced, CA 953481184722183
  30. Sumana Reddy, MDEl Cajon, CA 920201053300251
  31. Ellen Reich, MDFountain Valley, CA 927081225292279
  32. Ronald Renard, M.D.Redding, CA 960031497792436
  33. Grace Rhim, MDLadera Ranch, CA 926941790829174
  34. Marc Riedl, MDSan Diego, CA 921221285654889
  35. Michael Roberts, M.D.West Hills, CA 913071376567842
  36. Charles Robinson, MDStanford, CA 943051578699724
  37. Kelli Rose, M.D.San Luis Obispo, CA 934011407028798
  38. Christine Royer, M.D.Santa Rosa, CA 954011730566613
  39. Kristiarsi Rudito, MDRiverside, CA 925051720142359
  40. Joshua Sacha, D.O.Travis Afb, CA 945351275526634
  41. Robert Sachs, MDHayward, CA 945451083792857
  42. Monika Saeedian, M.D.Los Angeles, CA 900481629220959
  43. Carlos Salgado, MDPalo Alto, CA 943041275064388
  44. Bryn Salt, MDSan Diego, CA 921311467549345
  45. Shefali Samant, M.D.Los Angeles, CA 900271932391737
  46. Yana Samarasena, MDFountain Valley, CA 927081164683678
  47. Ashley Sandoval, M.D.Long Beach, CA 908081720408958
  48. Thomas Santora, MDSan Jose, CA 951171417098799
  49. John Saylor, MDOceanside, CA 920561518945955
  50. Danica Schulte, MDEncino, CA 914361386645083

Source: CMS NPPES, primary taxonomy 207K00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 21 of 51 per resident

  1. Hawaii1.2
  2. Arizona1.2
  3. Washington1.2
  4. California1.1
  5. Ohio1.1
  6. Rhode Island1.1
  7. 50 states and D.C.1.2

Source: CMS NPPES, primary taxonomy 207K00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

79.1% of these records appear in a Medicare file, against 80.0% 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. California79.1%
  2. United States80.0%

Allergy & Immunology Physician records in California, measured

  • In a Medicare file351 of 444 · 79.1% here, 80.0% nationally
  • In the CMS Doctors and Clinicians file281 · 63.3% here, 65.7% nationally
  • Not updated in five years or more276 · 62.2% here, 57.3% nationally
  • Median graduation year2004 · the 281 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 207K00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

444 NPPES records list allergy & immunology physician (207K00000X) as their primary taxonomy with a practice address in California: 1.1 per 100,000 residents against 1.2 nationally (50 states and D.C.). San Diego has 48 of them (11%).

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. Texas327
  2. New York311
  3. Florida204
  4. Pennsylvania183

States with a similar rate per 100,000

  1. Washington1.2
  2. Ohio1.1
  3. Rhode Island1.1
  4. Arizona1.2

The largest states

  1. Texas327
  2. New York311
  3. Florida204
  4. Pennsylvania183
  5. Illinois162

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.