NPPES file of Aug 9, 2026

Doctors and health care providers in Eureka, CA

2,854 individual NPPES records list a practice address in Eureka, 79th of 812 California cities. The largest group is case manager/care coordinator: 492, 17% of the city's records, against 2% across California. Page 31 of 58.

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

Eureka in California

  • Rank in California79th of 812 cities by records
  • Share of the state0.3% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups30.3% of all records
  • Case Manager/Care Coordinator rank10th of the 10 California cities with the most

Compared with California as a whole, Eureka has 27.3× the state's share of psychiatric/mental health registered nurse records and 0.15× its share of behavior technician records.

Providers in Eureka, alphabetically

  1. Nadia LynnCase Manager/Care Coordinator1649743121
  2. Kelly LynneCase Manager/Care Coordinator1164792537
  3. Jeffrey MaPharmacist1467948059
  4. Nikki Macan, ASWCase Manager/Care Coordinator1699555656
  5. Darin MacdougallCommunity Health Worker1043089915
  6. Ian MackenzieCase Manager/Care Coordinator1780244038
  7. Cindy Madden, MHWMental Health Counselor1184768558
  8. Margaret MaddenCommunity Health Worker1104205723
  9. Mary Madden, RNRegistered Nurse1356794366
  10. Kathleen Madsen, PTAPhysical Therapist1710376678
  11. Jennifer Mager, B.A.Specialist1255467536
  12. Michelle MagillCase Manager/Care Coordinator1215065719
  13. Barbara MagnattaOccupational Therapy Assistant1538557327
  14. Dianne MagnattaCase Manager/Care Coordinator1225540693
  15. Abigail MaguireBehavior Technician1255974366
  16. Kathryn Maguire, R.N.Psychiatric/Mental Health Registered Nurse1578757977
  17. Marcelle Mahan, M.D.General Practice Physician1245292085
  18. Timothy Mahanes, MDFamily Medicine Physician1124552658
  19. Joni Maher, LCSWClinical Social Worker1184048126
  20. Mary Mahoney, M.D.Surgery Physician1750352621
  21. Lynne Mahony, RNSchool Registered Nurse1043052202
  22. Nicole Mahouski, RNRegistered Nurse1457581662
  23. Terri MajorsCommunity Health Worker1164910055
  24. Ricky Mak, OTR, LOccupational Therapist1932671062
  25. Joan MalcuitPsychiatric/Mental Health Registered Nurse1679808414
  26. Melissa MaldonadoLicensed Vocational Nurse1952724262
  27. Tiffany MaldonadoCase Manager/Care Coordinator1326389693
  28. Wade MallettAddiction (Substance Use Disorder) Counselor1942903109
  29. Trudy MalloryStudent in an Organized Health Care Education/Training Program1740598291
  30. Patrick MalloyCase Manager/Care Coordinator1619294428
  31. Julia Mandel, LCSWClinical Social Worker1134586316
  32. Chandler MangiameliSchool Psychologist1548082217
  33. Fortunate MangwendePsychiatric/Mental Health Registered Nurse1902612450
  34. Nicholas MannCounselor1104077866
  35. Jonathon MansfieldDay Training/Habilitation Specialist1740121284
  36. Michael MansfieldDay Training/Habilitation Specialist1225824519
  37. Barbara Marchi, N.P.Women's Health Nurse Practitioner1386684579
  38. Gregory Margart, MA SLPSpeech-Language Pathologist1609075852
  39. Lisa MarieCase Manager/Care Coordinator1104047471
  40. Ln Marie, BACase Manager/Care Coordinator1700077096
  41. Cena Marino, M.A.Case Manager/Care Coordinator1114053063
  42. Natalie Marino, M.D.Family Medicine Physician1477856789
  43. Louise MarkPsychiatric/Mental Health Registered Nurse1427709831
  44. Tiffany MarmonCommunity Health Worker1841148285
  45. Candalynn MarquezPsychiatric/Mental Health Registered Nurse1255022521
  46. Jose Marrero-Castro, RNPsychiatric/Mental Health Registered Nurse1831434737
  47. Teresita MarroquinCase Manager/Care Coordinator1770966319
  48. Eva Marshall, M.D.Family Medicine Physician1326009820
  49. Jonathan MarshallRehabilitation Practitioner1164351235
  50. Parri MarshallProfessional Counselor1275956419

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

Eureka, California appears in the CMS National Plan and Provider Enumeration System with 2,854 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 Eureka - 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 Eureka 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 Eureka is weighted toward Case Manager/Care Coordinator (492 clinicians, followed by Psychiatric/Mental Health Registered Nurse with 206 and Marriage & Family Therapist with 167). 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, Eureka reports roughly 7.3 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 Analyst is the most prominent one with no provider currently listing a Eureka practice address, a coverage gap Eureka patients typically fill by traveling to a larger nearby hub.

For Eureka 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 Eureka, CA?

There are 2,854 registered healthcare providers in Eureka, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Eureka?

The most common specialties in Eureka are Case Manager/Care Coordinator, Psychiatric/Mental Health Registered Nurse, Marriage & Family Therapist, Clinical Social Worker, Registered Nurse. Case Manager/Care Coordinator has the most providers with 492.

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.