NPPES file of Aug 9, 2026

Doctors and health care providers in Martinez, CA

1,816 individual NPPES records list a practice address in Martinez, 127th of 812 California cities. The largest group is family medicine physician: 191, 11% of the city's records, against 2% across California. Page 25 of 37.

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

Martinez in California

  • Rank in California127th of 812 cities by records
  • Share of the state0.2% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups23.8% of all records

Compared with California as a whole, Martinez has 32.9× the state's share of case management registered nurse records and 0.19× its share of behavior technician records.

Providers in Martinez, alphabetically

  1. Anna O'Connor, MSW, LCSWClinical Social Worker1932306248
  2. Larry O'Connor, MDDiagnostic Radiology Physician1497789952
  3. Nana O'DonnellClinical Neuropsychologist1629526249
  4. Brian O'Neill, M.D.Internal Medicine Physician1366425985
  5. Amy OchenduszkoClinical Social Worker1659701860
  6. Maria Jennifer OcularRegistered Nurse1457736654
  7. Gary Oda, O.D.Optometrist1518017185
  8. William Ofstad, PHARMDPharmacist1427200690
  9. Jennifer Ogar, M.S.Speech-Language Pathologist1386685741
  10. Peter Oh, PHARM.DPharmacist1457778771
  11. Ayla OhanlonAddiction (Substance Use Disorder) Counselor1578198586
  12. Joon-Ha Ok, M.D.Urology Physician1336120088
  13. Shelley OkeyMarriage & Family Therapist1588992036
  14. Chike Okolo, PHARM.DPharmacotherapy Pharmacist1770915621
  15. Morayo Olatunbosun, NPFamily Nurse Practitioner1336770312
  16. Michael OlavidesPhysical Therapist1699088807
  17. Nancy OliverosCase Management Registered Nurse1205358728
  18. Gloria Olmos, R.N.Registered Nurse1629459185
  19. Mary Olowin, MDChild & Adolescent Psychiatry Physician1104904200
  20. Elhaam OmarMarriage & Family Therapist1396212122
  21. Olajumoke Omiyale, DNPMidwife1952240673
  22. Ilianna OntiverosBehavior Technician1437727237
  23. Fidelia OnyejekweClinical Social Worker1871010629
  24. Sayed OpeyanyChild & Adolescent Psychiatric/Mental Health Registered Nurse1740178599
  25. Angelina OrdunaMental Health Counselor1003218504
  26. Marjan OrellanaPharmacist1558215558
  27. Michelle Orengo-McFarlane, M.D.Family Medicine Physician1033348263
  28. Elizabeth Orme, LCSWClinical Social Worker1386705218
  29. Gregorio Ormeo, RT, R, MRIMagnetic Resonance Imaging Radiologic Technologist1659821395
  30. Fabiola Ornelas Mariscal, SUDCCAddiction (Substance Use Disorder) Counselor1962105601
  31. Cherly OrrAddiction (Substance Use Disorder) Counselor1770712473
  32. Joseph OrtegaRegistered Nurse1083006464
  33. Karina Ortiz, DPTPhysical Therapist1972161990
  34. Diana Ortiz-KennedyCommunity Health Worker1568226777
  35. Ken Oslin, M.T.Massage Therapist1396068565
  36. Katherine Osterloh, PTPhysical Therapist1700946571
  37. Tiffany OsullivanPhysical Therapist1396499869
  38. Austen Ott, MDStudent in an Organized Health Care Education/Training Program1255129334
  39. Nancy OwensFamily Medicine Physician1780865402
  40. Frances Pabalate, BSN, RN, PHN, OCNOncology Registered Nurse1174449730
  41. Jeanne PackeyClinical Social Worker1982200697
  42. Felisa PagaranRehabilitation Chiropractor1720695836
  43. Elizabeth Page, R.N.Case Management Registered Nurse1518215292
  44. Lauren Pak, FNPCommunity Health Nurse Practitioner1073821724
  45. Albert Palitz, MDGastroenterology Physician1255419735
  46. Rosaura PalomeraCase Manager/Care Coordinator1992987069
  47. Lori Panossian, MDNeurology Physician1134380918
  48. Sandra Paolini, M.A.Marriage & Family Therapist1366572083
  49. Lauri Pappas, MASTERSSpeech-Language Pathologist1780808592
  50. Eric ParbieCounselor1639460124

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

Martinez, California appears in the CMS National Plan and Provider Enumeration System with 1,816 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 Martinez - 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 Martinez 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 Martinez is weighted toward Family Medicine Physician (191 clinicians, followed by Pharmacist with 149 and Marriage & Family Therapist with 93). 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, Martinez reports roughly 4.7 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 Martinez practice address, a coverage gap Martinez patients typically fill by traveling to a larger nearby hub.

For Martinez 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 Martinez, CA?

There are 1,816 registered healthcare providers in Martinez, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Martinez?

The most common specialties in Martinez are Family Medicine Physician, Pharmacist, Marriage & Family Therapist, Student in an Organized Health Care Education/Training Program, Case Management Registered Nurse. Family Medicine Physician has the most providers with 191.

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.