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 9 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. Mark Tucker, M.D.San Diego, CA 921281790704203
  2. Arthur Turk, MDTustin, CA 927801437254943
  3. Paul Utz, MDStanford, CA 943051013043264
  4. Rebecca Vanlandingham, MDSan Francisco, CA 941081851465173
  5. Flora Vardanian, MDPasadena, CA 911011184772048
  6. Kishore Vasant, M.D.Murrieta, CA 925621790711661
  7. Deepti Vellaichamy Manian, MDSan Jose, CA 951191255884672
  8. Prashant Verma, M.D.Ventura, CA 930031972787638
  9. Heather Volpp, M.D.Torrance, CA 905031083702120
  10. Karl Vontiehl, M.D.San Marino, CA 911081013165869
  11. Maheshkumar Vyas, M.D.Anaheim, CA 928081942279633
  12. David Waldman, M.D.Rancho Mirage, CA 922701467463265
  13. Hannah Walford, MDMenlo Park, CA 940251215190509
  14. Kristen Walters, MDAliso Viejo, CA 926561437442308
  15. Xiao Wan, MDMenlo Park, CA 940251295099042
  16. Vivian Wang, M.D.Los Angeles, CA 900951821416744
  17. Ziwei WangSanta Monica, CA 904041760914436
  18. Hannah WangbergSan Diego, CA 921031306233663
  19. Diane Wara, M.D.San Francisco, CA 941431750317004
  20. Stephen Wasserman, M.D.La Jolla, CA 920371588612154
  21. Steven Weinstein, MDHuntington Beach, CA 926471518035120
  22. Cathy Weiss Green, M.D.Santa Monica, CA 904041043247661
  23. Michael Welch, M.D.San Diego, CA 921231699794222
  24. Andrew White, M.D.San Diego, CA 921301750352761
  25. Sharon Williams, M.D.North Tustin, CA 927051457772949
  26. Katharine Woessner, M.D.San Diego, CA 921301184663650
  27. James Wolfe, MDSan Jose, CA 951171194733428
  28. Jason WongOrange, CA 928681376170449
  29. Michael Wong, MDStockton, CA 952101982782884
  30. Priscilla Wong, M.D.Roseville, CA 956611134353949
  31. Lenore Wooding, MDChico, CA 959261528065216
  32. Shijun Xi, M.D.Los Angeles, CA 900331407130636
  33. Jennifer Xu, MDSanta Monica, CA 904041124569389
  34. Yan Yan, M.D.Burlingame, CA 940101154663771
  35. Eric YenTorrance, CA 905051447464375
  36. Yesim Yilmaz Demirdag, M.D.Irvine, CA 926971134330921
  37. Denis Yoshii, D.O.Costa Mesa, CA 926261124091814
  38. Ted Young, M.D.Pleasanton, CA 945881508910324
  39. Francis Yu, M.D.Irvine, CA 926041184651283
  40. June Zhang, MDSan Mateo, CA 944011174787170
  41. Robert Ziering, M.D.Vista, CA 920831215933148
  42. Ahdad ZiyarSanta Ana, CA 927051205330685
  43. Mark Zlotlow, MDRoseville, CA 956611154409860
  44. Bruce Zuraw, MDSan Diego, CA 921031780634261

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.