NPPES file of Aug 9, 2026

Doctors and health care providers in Grass Valley, CA

1,540 individual NPPES records list a practice address in Grass Valley, 142nd of 812 California cities. The largest group is mental health counselor: 151, 10% of the city's records, against 3% across California. Page 31 of 31.

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

Grass Valley in California

  • Rank in California142nd of 812 cities by records
  • Share of the state0.2% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups28.2% of all records

Compared with California as a whole, Grass Valley has 15.1× the state's share of adult companion records and 0.31× its share of student in an organized health care education/training program records.

Providers in Grass Valley, alphabetically

  1. Alexis WolfsonRehabilitation Practitioner1558828665
  2. Madisen WolleckRehabilitation Practitioner1619633542
  3. Alan Wong, M.D.Urology Physician1740237163
  4. Darlene WooMarriage & Family Therapist1386253821
  5. Kai WooCounselor1881292886
  6. Alisa Wood, LCSWClinical Social Worker1447476288
  7. Kelsey WoodCounselor1336501949
  8. Keri WoodPeer Specialist1962109975
  9. Scott WoodAddiction (Substance Use Disorder) Counselor1588008783
  10. Kevin Woodburn, O.D.Optometrist1912953217
  11. Ian WoodgriftCounselor1194205278
  12. Robert Woodhall, D.C.Chiropractor1417266917
  13. Kathryn WoodruffMental Health Counselor1053911826
  14. Nathaniel Woodruff, M.D., PHD, FACCCardiovascular Disease Physician1275623191
  15. Annalise Woods MagallanesCounselor1760034938
  16. Brenda Woodward, RADTAddiction (Substance Use Disorder) Counselor1184255150
  17. Cory Woody, CATCAddiction (Substance Use Disorder) Counselor1518486554
  18. Judith WrightSpecialist1841218260
  19. Philip Wright, CMTMassage Therapist1861762692
  20. Kaitlin Wylie, LVNLicensed Vocational Nurse1710869136
  21. Pa Soua Xiong, M.D.Family Medicine Physician1386015220
  22. Peter Yaholkovsky, MDInternal Medicine Physician1306489604
  23. Camille YahrmarktMassage Therapist1477228179
  24. Eric Yang, PHARMDPharmacist1871064378
  25. Zong YangCounselor1487263463
  26. Danielle Yantis, M.S., R.D.Registered Dietitian1417383738
  27. Lisa YocumSchool Psychologist1770340580
  28. Jeremy Young, DDS MMSCDentist1942286885
  29. Robin Young, SUDCC IIAddiction (Substance Use Disorder) Counselor1245909217
  30. Rachelle YoungmanStudent in an Organized Health Care Education/Training Program1992544118
  31. Queene Carla ZaportezaClinical Social Worker1689226904
  32. Matthew Zavala, BA PSY, MA LMFTMarriage & Family Therapist1821311077
  33. Claudia ZdremtanRegistered Nurse1063761880
  34. Madeline Zea, PAPhysician Assistant1962166330
  35. Matthew Zealear, M.D.Ophthalmology Physician1366516981
  36. Nancy ZeislerSchool Counselor1215897004
  37. Laura Zieman, R.N.Registered Nurse1699048470
  38. Thomas Zimmerman, M.D.Emergency Medicine Physician1295734127
  39. Ingo Zirpins, M.S.P.T.Physical Therapist1023454923
  40. Stacy Zolldan, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1073936019

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

Grass Valley, California appears in the CMS National Plan and Provider Enumeration System with 1,540 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 Grass Valley - 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 Grass Valley 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 Grass Valley is weighted toward Mental Health Counselor (151 clinicians, followed by Addiction (Substance Use Disorder) Counselor with 148 and Marriage & Family Therapist with 136). 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, Grass Valley reports roughly 4 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, Behavior Technician is the most prominent one with no provider currently listing a Grass Valley practice address, a coverage gap Grass Valley patients typically fill by traveling to a larger nearby hub.

For Grass Valley 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 Grass Valley, CA?

There are 1,540 registered healthcare providers in Grass Valley, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Grass Valley?

The most common specialties in Grass Valley are Mental Health Counselor, Addiction (Substance Use Disorder) Counselor, Marriage & Family Therapist, Counselor, Physical Therapist. Mental Health Counselor has the most providers with 151.

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.