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 20 of 21.
The 8 largest groups in Union City
Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.
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
- Kimberly WilliamsCounselor1659676864
- Laura Wilson, LMFTMarriage & Family Therapist1164966073
- Nanette Winterfelt, LCSWClinical Social Worker1508919051
- Agnieszka Wisniewska, M.D.Psychiatry Physician1659501708
- Anna Witanto, D.D.S.General Practice Dentistry1477693133
- Aryn WolfeClinical Social Worker1144783879
- Angela Wong, ODOptometrist1275195141
- Carmen Wong, PHARM.D.Pharmacist1376813865
- Cho Kui WongSpeech-Language Pathologist1225733116
- Connie Wong, O.D.Optometrist1205241593
- Ernest Wong, DMDGeneral Practice Dentistry1518526821
- Joshua Wong, DCChiropractor1710803648
- Matthew Wong, O.D.Optometrist1306101746
- Yvonne Wong, RPHPharmacist1154325975
- Andrew Woo, DDSGeneral Practice Dentistry1710039813
- Aja Wooden-Xenos, PSYDClinical Psychologist1679887343
- Wendy WrightSpeech-Language Assistant1760306112
- Christina Wu, M.D.Internal Medicine Physician1790837920
- Jeffery Wu, DPTPhysical Therapist1811509813
- Martha Wunsch, M.D.Pediatrics Physician1275709230
- Athena Xides, PHARMDPharmacist1831820125
- Song Qing Xue, L. ACAcupuncturist1629417027
- Christian Michael YabutBehavior Technician1699696484
- Jessica YangMarriage & Family Therapist1548748064
- Yuxiang Yang, MDFamily Medicine Physician1972131480
- Matthew Yap, PHARMDPharmacist1003428384
- Sean Yarber, COTAOccupational Therapy Assistant1144840596
- Nicholas Yatco, DDSGeneral Practice Dentistry1114124120
- Wilma Yaung, M.D.Internal Medicine Physician1437237294
- Roma Lee Ybera, OTR/LOccupational Therapist1851017164
- Amanda Yee, PHARMDPharmacist1245980481
- Kathleen YeePhysician Assistant1902683022
- Stephen Yee, O.D.Optometrist1952453045
- Amy Yeh, PHARMDPharmacist1447901244
- Sang Yi, PTPhysical Therapist1689738775
- Lauren YokomizoInternal Medicine Physician1073969184
- Justin Yoshihara, DMDDentist1649830969
- Stephen Young, M.D.Obstetrics & Gynecology Physician1790863546
- Amy YuPharmacist1356989214
- Jennyfer YuBehavior Technician1417730052
- Jessica Yu, PHARMDPharmacist1851704191
- Judy Yuen, PSYDClinical Psychologist1114153830
- Wing Yuen, PHARMDPharmacist1619499407
- Jean Zee, P.T.Physical Therapist1033256136
- Naweed ZemaryalaiPhlebotomy Technician1073443578
- Daniel ZenarosaPhysical Therapist1790606010
- Reema Zereh, D.C.Chiropractor1073648606
- Jessica ZhangOccupational Therapist1891534038
- Ying Zhang, M.D.Geriatric Medicine (Family Medicine) Physician1861665564
- Zuo Zhang, ACUPUNCTURISTAcupuncturist1205525029
The largest California cities
- Los Angeles69,537
- San Diego52,937
- San Francisco38,143
- Sacramento33,083
- San Jose20,925
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.