NPPES file of Aug 9, 2026

Registered Nurse in California

13,506 NPPES records list registered nurse with a practice address in California, 35 per 100,000 residents, the 30th highest rate of 51. San Diego and San Francisco have the most; each record links to the provider's NPI and the California license search. Page 227 of 271.

CMS NPPES registry, file of Aug 9, 2026; 2023 Census estimates · NUCC 163W00000X · 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, 1,223

  1. San Diego1,223
  2. San Francisco625
  3. Los Angeles526
  4. Sacramento508
  5. Fresno500

Registered Nurse records in California

  1. Katelyn Sierra, RNSan Diego, CA 921141447145750
  2. Khamsy Siharath, RN.Oceanside, CA 920571194167429
  3. Nicole Sihota, RNFowler, CA 936251710770011
  4. Sheena SihotaSan Diego, CA 921231013308907
  5. Exia Sikes, RNOakland, CA 946011871693051
  6. Alison Sikola, RNSan Jose, CA 951261053625194
  7. Hisar Silalahi, RNVisalia, CA 932921497466817
  8. Gwendolyn Siler, RNSanta Cruz, CA 950601457109282
  9. Norma Siley, RNEncino, CA 914361972340479
  10. Fabiola Silis, RNLos Angeles, CA 900071053067710
  11. Cassandra Sillas, RNCalexico, CA 922311356067292
  12. Johanna Sillick, RNSan Diego, CA 921301851981997
  13. Chaney SilvaSan Diego, CA 921021649837527
  14. Cynthia Silva, REGISTERED NURSECastaic, CA 913841932573961
  15. Elisa Silva, RNRedondo Beach, CA 902781639104581
  16. Irene Silva, RNSanta Maria, CA 934551467644930
  17. Irma Silva, RNFortuna, CA 955401497159859
  18. Maureen SilvaEureka, CA 955011871089425
  19. Naomi Silva, RNSan Diego, CA 921231417673195
  20. Nicole Silva, RNHesperia, CA 923451730688664
  21. Rina SilvaRiverside, CA 925051295966703
  22. Vanessa Silver, RN, BSNSan Francisco, CA 941031508742958
  23. Wendie Silverman-Martin, RNSan Rafael, CA 949031801477153
  24. Ann Lorraine SilvestreWest Sacramento, CA 956911912486903
  25. Jay SilvestreSan Diego, CA 921031649033382
  26. Gloria Silvestri, PHN, RNSan Mateo, CA 944031386972529
  27. Enrique SimCosta Mesa, CA 926271437985819
  28. Marvin SimandjuntakColton, CA 923241952658999
  29. Jeperson SimanjuntakColton, CA 923241730564329
  30. Sondang SimbolonColton, CA 923241528413465
  31. Holly SimentalScotts Valley, CA 950661225956287
  32. Elisabeth Simeone, RNPalo Alto, CA 943061255098463
  33. Karen Simerlink, RNLong Beach, CA 908031780045757
  34. Kim SimersonSan Jose, CA 951261811384951
  35. Carol Simmers-TilmaMerced, CA 953411760778757
  36. Doris Simmons, REGISTERED NURSESan Diego, CA 921031083460687
  37. Elizabeth Simmons, NPStockton, CA 952021649588393
  38. Kimbra Simmons, RNWinterhaven, CA 922831588180822
  39. Sharon SimmonsTemecula, CA 925901285387621
  40. Lisa Simms, RNMartinez, CA 945531407092356
  41. Raina SimmsAlhambra, CA 918031194649699
  42. Mitra SimnerMoreno Valley, CA 925531982586947
  43. Melissa Simon, RN PHNSan Diego, CA 921081922843747
  44. Patrick SimonColton, CA 923241275704835
  45. Pearl Simon, RNSan Diego, CA 921101740611888
  46. Sheena Simon, R.N.San Francisco, CA 941101962868547
  47. Karrie SimoncicFrench Camp, CA 952311184189276
  48. Gail Simons, RNSanta Rosa, CA 954051275778375
  49. Jane Simpson, RNSoquel, CA 950731871731646
  50. Joshua Simpson, RNSan Pedro, CA 907311073817540

Source: CMS NPPES, primary taxonomy 163W00000X: records by practice city and the list of records, file of Aug 9, 2026.

California ranks 30 of 51 per resident

  1. Maryland40
  2. Arkansas40
  3. Oklahoma36
  4. California35
  5. Kansas34
  6. South Carolina33
  7. 50 states and D.C.44

Source: CMS NPPES, primary taxonomy 163W00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.

2.5% of these records appear in a Medicare file, against 1.5% 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. California2.5%
  2. United States1.5%

Registered Nurse records in California, measured

  • In a Medicare file343 of 13,506 · 2.5% here, 1.5% nationally
  • In the CMS Doctors and Clinicians file146 · 1.1% here, 1.0% nationally
  • Not updated in five years or more7,263 · 53.8% here, 57.2% nationally
  • Median graduation year2018 · the 146 records with a school on file

Source: CMS NPPES, file of Aug 9, 2026 (primary taxonomy 163W00000X); CMS Medicare Part D Prescribers 2024, MIPS 2023, Open Payments 2024 and Doctors and Clinicians, matched by NPI.

What the count covers

13,506 NPPES records list registered nurse (163W00000X) as their primary taxonomy with a practice address in California: 35 per 100,000 residents against 44 nationally (50 states and D.C.). San Diego has 1,223 of them (9%).

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. Ohio9,656
  2. Texas8,921
  3. Washington5,708
  4. Michigan5,589

States with a similar rate per 100,000

  1. Kansas33.9
  2. Oklahoma35.9
  3. South Carolina32.8
  4. Vermont31.0

The largest states

  1. New York25,740
  2. Ohio9,656
  3. Texas8,921
  4. Washington5,708
  5. Michigan5,589

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.