NPPES file of Aug 9, 2026

Registered Dietitian in California

7,148 NPPES records list registered dietitian with a practice address in California, 18 per 100,000 residents, the 35th 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 82 of 143.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 133V00000X · 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, 504

  1. San Diego504
  2. Los Angeles487
  3. San Francisco427
  4. Sacramento232
  5. San Jose151

Registered Dietitian records in California

  1. Ivy Marx, R.D.Los Angeles, CA 900371588056774
  2. Alicia Marzolf, RDSacramento, CA 958171003514712
  3. Ceseana Marzouk, M.S., R.D.San Leandro, CA 945771750744959
  4. Marianna Marzvanyan, RDSun Valley, CA 913521275019630
  5. Anna MasadaSan Jose, CA 951191992837769
  6. Heather Mason, RD, CDCESLos Angeles, CA 900151467044073
  7. Irene Mason, R.D.Bishop, CA 935141962703736
  8. Paula Mason, RDElk Grove, CA 957581942910575
  9. Michelle Massa, MSRD, CDERed Bluff, CA 960801447829189
  10. Lucy MasseySan Pablo, CA 948061437298932
  11. Shannon Massey, R.D.Santa Maria, CA 934551710295480
  12. Lauren Massie, RDN, LD, CLCSan Francisco, CA 941041497641617
  13. Kelsey Massis, RDRancho Cucamonga, CA 917301801135793
  14. Emmanuel Mata, RDLos Angeles, CA 900061063851582
  15. Faith Mather, RD, CNSCSan Diego, CA 921241992426597
  16. Melissa Mathes, RDNLaguna Niguel, CA 926771003656075
  17. Joanna Mathews, R.D.Newport Beach, CA 926631821337072
  18. Kate Mathias, RDPalo Alto, CA 943041912860545
  19. Denise MathisRoseville, CA 956611760187512
  20. Sangeetha Mathivanan, MS,RDSan Leandro, CA 945781487851796
  21. Sarah Mathot, MS, RDMission Viejo, CA 926911700913837
  22. Anushka Mathur, RDNOakland, CA 946071386397727
  23. Garima Mathur, RD/LD, CDENational City, CA 919501821280447
  24. Vivian Matiossian, RD,CDEArcadia, CA 910061962685727
  25. Christine Mativo, RDNFresno, CA 937061275059578
  26. Karol Matson, R. D.San Fernando, CA 913401336379759
  27. Judy Matsuoka, R.D.Sepulveda, CA 913431821029570
  28. Chandra Matthews, R.D., C.D.E.Santa Rosa, CA 954011952851016
  29. Kimberly Matthews, R.D.Sonora, CA 953701669775177
  30. Kristi Matthews, REGISTERED DIETITIANSanta Cruz, CA 950621770082802
  31. Patricia Matthews, RDOceanside, CA 920561750879714
  32. Sara MatthewsLos Angeles, CA 900041508717158
  33. Molly MatthiesenSacramento, CA 958171780250845
  34. Nancy Matthiessen, MAS, RD, CSPSan Francisco, CA 941431922556315
  35. Timothy Matthiessen, RDWalnut Creek, CA 945961972276475
  36. Marina Mattson, RDNSan Diego, CA 921211548752645
  37. Miriam Matulich, RDNewport Beach, CA 926631346281672
  38. Lindsey Matulis, RDTorrance, CA 905021134901093
  39. Agata Matusz, RDRedondo Beach, CA 902781376820910
  40. Margaret Matzinger, RDSunnyvale, CA 940861467119685
  41. Donna Maudlin, R.D.Lynwood, CA 902621720226038
  42. Kasuen Mauldin, PHD, RDSan Jose, CA 951921295605541
  43. River Maxwell, RDSan Francisco, CA 941211154178051
  44. Laura May, RDRiverside, CA 925041124205984
  45. Vanessa May, RDNCalabasas, CA 913021902566052
  46. Susan Mayeda, RDInglewood, CA 903011295763464
  47. Jennifer Mayer, MS, RDEncinitas, CA 920241013459460
  48. Olivia Mayer, RDPalo Alto, CA 943041811594344
  49. Tanya MaytonRiverside, CA 925031538856711
  50. Adriana Maza, RDNSan Francisco, CA 941021568073153

Source: CMS NPPES, primary taxonomy 133V00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 35 of 51 per resident

  1. Hawaii19
  2. Arkansas19
  3. Louisiana19
  4. California18
  5. Maryland18
  6. Nebraska18
  7. 50 states and D.C.20

Source: CMS NPPES, primary taxonomy 133V00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

5.4% of these records appear in a Medicare file, against 7.4% 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. California5.4%
  2. United States7.4%

Registered Dietitian records in California, measured

  • In a Medicare file385 of 7,148 · 5.4% here, 7.4% nationally
  • In the CMS Doctors and Clinicians file531 · 7.4% here, 9.8% nationally
  • Not updated in five years or more3,904 · 54.6% here, 56.3% nationally
  • Median graduation year2014 · the 529 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 133V00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

7,148 NPPES records list registered dietitian (133V00000X) as their primary taxonomy with a practice address in California: 18 per 100,000 residents against 20 nationally (50 states and D.C.). San Diego has 504 of them (7%).

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. Texas5,099
  2. New York4,724
  3. Florida3,443
  4. Pennsylvania3,083

States with a similar rate per 100,000

  1. Maryland18.2
  2. Louisiana18.5
  3. Nebraska18.1
  4. Michigan18.1

The largest states

  1. Texas5,099
  2. New York4,724
  3. Florida3,443
  4. Pennsylvania3,083
  5. Illinois2,870

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.