NPPES file of Aug 9, 2026

Doctors and health care providers in San Leandro, CA

4,976 individual NPPES records list a practice address in San Leandro, 35th of 812 California cities. The largest group is counselor: 827, 17% of the city's records, against 1% across California. Page 67 of 100.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

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

The 8 largest groups in San Leandro

  1. Counselor827
  2. Mental Health Counselor481
  3. Behavior Technician362
  4. Marriage & Family Therapist322
  5. Clinical Social Worker270
  6. Students in training144
  7. Community Health Worker144
  8. Pharmacist132

Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.

San Leandro in California

  • Rank in California35th of 812 cities by records
  • Share of the state0.5% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups33.6% of all records
  • Counselor rank2nd of the 10 California cities with the most

Compared with California as a whole, San Leandro has 83.1× the state's share of assistant health information record technician records and 0.41× its share of behavior technician records.

Providers in San Leandro, alphabetically

  1. Emika OlivierCounselor1225209687
  2. Brandi OlooMental Health Counselor1710354758
  3. Graham OlsenCounselor1801253661
  4. Lindsey OlsenSpeech-Language Pathologist1093182792
  5. Todd Olsen, MDSurgery Physician1841378692
  6. Roger OlsonNurse Practitioner1235367020
  7. Ronald Olson, M.D.Diagnostic Radiology Physician1003850082
  8. Tristan OlsonClinical Social Worker1396290920
  9. Toluwani OlukoyaBehavior Technician1043844533
  10. Lauren OnderkoMental Health Counselor1821434408
  11. Anabel OntiverosRehabilitation Practitioner1124586425
  12. Bryan OnwukaClinical Social Worker1578740916
  13. Rashida OnwukaMental Health Counselor1003191966
  14. Alexis OparahCounselor1831524057
  15. Dorothy OrakweSocial Worker1679431118
  16. Jonathan OrbetaCounselor1114458239
  17. Sara OrdazCounselor1104105014
  18. Gema OrdonezCommunity Health Worker1245754530
  19. Yolanda OrnelasCounselor1720428816
  20. Maria Orozco Coronado, PPSCSchool Counselor1114760980
  21. Alexandra Ortega, D.O.Emergency Medicine Physician1710332655
  22. Clarissa Ortega, SUDRCAddiction (Substance Use Disorder) Counselor1003543653
  23. Jose Ortega, MAMental Health Counselor1588864268
  24. Rita OrtegaCounselor1437678232
  25. Flora Ortiz, BACounselor1144569674
  26. Teela OrtizBehavior Technician1366393241
  27. Verenice OrtizBehavior Technician1497340764
  28. Maritza Ortiz HernandezClinical Social Worker1497395321
  29. Alejandra Ortiz SanchezCase Manager/Care Coordinator1033709290
  30. Marisol Ortiz-MelendrezCounselor1821345067
  31. Scott Osborn, LCSWClinical Social Worker1922171818
  32. Sharon Oshita, MS, ATC, MMCIT, CMTAthletic Trainer1700278603
  33. Shaden OsmanBehavior Technician1134718521
  34. Laura Ostrow, MFTMarriage & Family Therapist1679875181
  35. Joseph Osullivan-TrevenaMental Health Counselor1861110983
  36. Chukwuka Osuorji, RNRegistered Nurse1598198244
  37. Brandon Osypiewski, R1580100924Addiction (Substance Use Disorder) Counselor1518786177
  38. Joshua OttMental Health Counselor1962751982
  39. Fred Ou-Yang, DDSDentist1316033285
  40. Khom Sai OunniyomMarriage & Family Therapist1578779120
  41. Jaseon Outlaw, PHDClinical Psychologist1861747552
  42. Sherrie OuyangPharmacist1255994893
  43. Diahann OverallMental Health Counselor1407054927
  44. Jumana OweisBehavior Technician1992687800
  45. Casey OwenCounselor1720322837
  46. Jacquelyn OwensCounselor1003263211
  47. Jasmine OwensBehavior Technician1225629223
  48. Yolanda OwensRegistered Nurse1104619956
  49. Joanna OyarzabalCounselor1376919571
  50. Maureen OyarzoDoula1073475067

The largest California cities

  1. Los Angeles69,537
  2. San Diego52,937
  3. San Francisco38,143
  4. Sacramento33,083
  5. San Jose20,925

All of California →

How to read this directory

San Leandro, California appears in the CMS National Plan and Provider Enumeration System with 4,976 registered healthcare providers spanning 25 or more distinct NUCC-taxonomy specialties. This count includes every individual clinician who has applied for an NPI and listed a practice address in San Leandro - physicians, dentists, nurse practitioners, physician assistants, chiropractors, physical therapists, optometrists, psychologists, podiatrists, and every other credentialed provider type CMS tracks. It does not measure hospital beds, urgent-care capacity, or whether a given clinic is accepting new patients; it measures the pool of professionals with current NPI enrollment and a San Leandro practice location on file. Every figure is drawn from the federal National Provider Identifier Registry (CMS NPPES) - more than 7 million providers, maintained since May 2007, with 2024 Medicare Part D data, and, according to CMS, can be searched, compared, and traced in our methodology.

The provider mix in San Leandro is weighted toward Counselor (827 clinicians, followed by Mental Health Counselor with 481 and Behavior Technician with 362). That distribution reflects how NPPES records specialty: providers self-select a primary taxonomy code, so a family physician who also practices geriatrics will show up under whichever NUCC code they registered first. Relative to California's population, San Leandro reports roughly 12.8 providers per 100,000 residents using the state-level denominator, which is a rough proxy rather than a precise access-to-care measurement; the true catchment area of any {cityName} clinician extends beyond the municipal boundary.

For San Leandro patients, this directory is most useful as a starting shortlist. Important: PlainDoctor is a directory of publicly available CMS government data, not a review site, a ranking, or medical advice. NPPES data is self-reported and refreshed monthly; call the practice directly to confirm the provider is still there, accepts your insurance, and is taking new patients.

For informational purposes only; this directory is not medical advice and not a substitute for checking a license. See also: how to find a doctor and how to verify one.

Common questions

How many doctors are in San Leandro, CA?

There are 4,976 registered healthcare providers in San Leandro, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in San Leandro?

The most common specialties in San Leandro are Counselor, Mental Health Counselor, Behavior Technician, Marriage & Family Therapist, Clinical Social Worker. Counselor has the most providers with 827.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov). Records are self-reported registrations, not licenses.

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.