NPPES file of Aug 9, 2026

Doctors and health care providers in Union City, CA

1,006 individual NPPES records list a practice address in Union City, 187th of 812 California cities. The largest group is behavior technician: 117, 12% of the city's records, against 18% across California. Page 14 of 21.

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

Union City in California

  • Rank in California187th of 812 cities by records
  • Share of the state0.1% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups25.4% of all records

Compared with California as a whole, Union City has 8.4× the state's share of speech-language assistant records and 0.32× its share of marriage & family therapist records.

Providers in Union City, alphabetically

  1. Tam Nguyen, M.D.Family Medicine Physician1093929697
  2. Thanhlan NguyenPharmacist1851610315
  3. Natalya Nicoloff, N.P.Adult Health Nurse Practitioner1033225057
  4. Charlene Niizawa, M.D.Occupational Medicine Physician1558449314
  5. Kinjal Nirmal, MPTStudent in an Organized Health Care Education/Training Program1689045072
  6. Diana NisbettBehavior Technician1285416834
  7. Pamela Nitsos, M.D.Internal Medicine Physician1063413623
  8. Francisco Nunez, DPTPhysical Therapist1104544246
  9. Maria NunezCommunity Health Worker1780993865
  10. Camille Nuttall, CCC-SLPSpeech-Language Pathologist1073256897
  11. Maria Trinidad NuydaLicensed Vocational Nurse1265066443
  12. Megan O'Connell, BEHAVIOR TECHNICIANBehavior Technician1215438296
  13. Tiana O'NealBehavior Technician1710855242
  14. Jean Oakley, PH.D.Clinical Psychologist1245390665
  15. Cherille Ocampo, PTPhysical Therapist1689295685
  16. Jessica OcampoPharmacist1932807500
  17. Angelica OchoaSpeech-Language Assistant1124658497
  18. Lourdes OchoaCommunity Health Worker1659881969
  19. Jasper Oh, AU.D.Audiologist1245994722
  20. Hidemi Oka, DMD MD MSOral and Maxillofacial Surgery (Dentist)1629260369
  21. Michael Olalia, M.D.Internal Medicine Physician1477086320
  22. Charlie Olivar, BTBehavior Technician1437091824
  23. Ashkon Olyaie, PAPhysician Assistant1407397326
  24. Olajumoke OmolayoleBehavior Technician1528918307
  25. Adina OronaBehavior Technician1265281208
  26. Rie OsakaPhysical Therapist1285313833
  27. Kathleen Osio, OTR/LOccupational Therapist1003384355
  28. Tasha PadiaOccupational Therapist1831012863
  29. Duncan PadillaCounselor1093479149
  30. Sandra-Emily Pagliarulo, SLPASpeech-Language Assistant1104391887
  31. Jacob Pai, D.D.S.Dentist1760549364
  32. Jayasudha Palavalli, M.D.Internal Medicine Physician1013089846
  33. Cynthia PalaviClinical Social Worker1922328269
  34. Ying Pan, M.D.Ophthalmology Physician1821236068
  35. Eloisa PanopioBehavior Analyst1972031466
  36. Nikita ParagjiBehavior Technician1831956242
  37. Salvador ParaynoPhysical Therapy Assistant1477946556
  38. Neela Parekh, R.DMetabolic Nutrition Registered Dietitian1851446249
  39. Edemel ParenoRegistered Nurse1770046955
  40. Hannah Park, O.D.Optometrist1376690156
  41. Jennifer ParkPharmacist1417594672
  42. Trina ParkPhysical Therapist1043388150
  43. Trisha Park, OTR/LPediatric Occupational Therapist1013403120
  44. Natalie Passey, FNPPrimary Care Nurse Practitioner1821717984
  45. Kokila Patel, RPTPhysical Therapist1740282235
  46. Yolan PattersonCounselor1932353794
  47. Olivia PeinadoCommunity Health Worker1205145380
  48. Allison Pentecost, PSY.D.Clinical Psychologist1770977233
  49. Minerva Peralta, RPHPharmacist1588966006
  50. Lisa Perez, MPTGeriatric Physical Therapist1861682049

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

Union City, California appears in the CMS National Plan and Provider Enumeration System with 1,006 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 Union City - 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 Union City 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 Union City is weighted toward Behavior Technician (117 clinicians, followed by Pharmacist with 75 and Speech-Language Pathologist with 64). 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, Union City reports roughly 2.6 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.

Of California's most common specialties, Student in an Organized Health Care Education/Training Program is the most prominent one with no provider currently listing a Union City practice address, a coverage gap Union City patients typically fill by traveling to a larger nearby hub.

For Union City 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 Union City, CA?

There are 1,006 registered healthcare providers in Union City, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Union City?

The most common specialties in Union City are Behavior Technician, Pharmacist, Speech-Language Pathologist, Physical Therapist, General Practice Dentistry. Behavior Technician has the most providers with 117.

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.