NPPES file of Aug 9, 2026

Doctors and health care providers in Petaluma, CA

1,856 individual NPPES records list a practice address in Petaluma, 122nd of 812 California cities. The largest group is behavior technician: 549, 30% of the city's records, against 18% across California. Page 32 of 38.

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

The 8 largest groups in Petaluma

Source: CMS NPPES primary taxonomy, file of Aug 9, 2026.

Petaluma in California

  • Rank in California122nd of 812 cities by records
  • Share of the state0.2% of California's records
  • Specialties present25 or more taxonomy codes
  • Top three groups42.5% of all records

Compared with California as a whole, Petaluma has 12.6× the state's share of other technician records and 0.26× its share of student in an organized health care education/training program records.

Providers in Petaluma, alphabetically

  1. Nakai SimsBehavior Technician1144196650
  2. John Sinclair, D.D.S.General Practice Dentistry1578535472
  3. Madelin SinclairBehavior Analyst1235094277
  4. Martine Sinkondo, BCBABehavior Analyst1215597737
  5. Erica Situ, FNP-CFamily Nurse Practitioner1568232908
  6. Loree SkidmoreFamily Nurse Practitioner1346453297
  7. Jeffrey SlagowskiOther Technician1265691570
  8. Jennifer Sloan, M.S., L.AC.Acupuncturist1730638396
  9. Marguerite SmallClinical Psychologist1740300326
  10. Jennifer SmitCounselor1477961258
  11. Amilea SmithBehavior Technician1679031363
  12. Angela SmithBehavior Technician1497228332
  13. Antonio SmithBehavior Technician1598317992
  14. Carol SmithHome Health Aide1962731877
  15. Chelsea Smith, PMHNPPsychiatric/Mental Health Nurse Practitioner1558154260
  16. Gary SmithCounselor1023425170
  17. Janese SmithMassage Therapist1831703651
  18. Kati SmithCounselor1013324144
  19. Russel SmithBehavior Technician1639740673
  20. Christina SoilandStudent in an Organized Health Care Education/Training Program1689380040
  21. Debra Sojka, P.T.Physical Therapist1306933676
  22. Omar SolanoBehavior Technician1821899352
  23. Dina SolisOther Specialist/Technologist1083350789
  24. Alicia Soliz, MASchool Psychologist1861013963
  25. Sithara Somasekharan Nair, DDSDentist1518847508
  26. Eiler Sommerhaug, M.D.Plastic and Reconstructive Surgery Physician1659353555
  27. Kimberly Sommerhaug, NP, MSNFamily Nurse Practitioner1609037951
  28. Scott Songer, MAMental Health Counselor1558798157
  29. Wade SongerDay Training/Habilitation Specialist1700763836
  30. Emani SosaBehavior Technician1922565431
  31. Kaitlin Soule, LMFTMarriage & Family Therapist1386999514
  32. Priya SowerbyMarriage & Family Therapist1679584965
  33. Timothy Sowerby, MDGastroenterology Physician1063475952
  34. Amanda Spencer, PSY.D.Clinical Psychologist1164805784
  35. Jordan SpencerOther Technician1598945677
  36. Jennifer SpenglerCounselor1578698171
  37. Lewis SpenglerCounselor1063821569
  38. Riley SpindlerBehavior Technician1669062436
  39. Samantha Spinner, PA-CPhysician Assistant1902407679
  40. Hilary SpoliniMarriage & Family Therapist1891614103
  41. Elizabeth SprangerBehavior Technician1962071712
  42. Krystallin StacyBehavior Technician1104389733
  43. Arnella StaffordBehavior Technician1427524719
  44. Ariel StanfordBehavior Technician1467017640
  45. Thomas Stanton, M.D.Hematology & Oncology Physician1699855445
  46. Rebecca Stanwyck, LCSWClinical Social Worker1114061678
  47. Alicia Starrett, M.A.Speech-Language Pathologist1083739676
  48. Kelly Staton, O.D.Optometrist1548302649
  49. Marilyn Stefonetti, LMFT, NEMarriage & Family Therapist1003007238
  50. Martin Steigner, D.D.S.Pediatric Dentistry1093859969

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

Petaluma, California appears in the CMS National Plan and Provider Enumeration System with 1,856 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 Petaluma - 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 Petaluma 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 Petaluma is weighted toward Behavior Technician (549 clinicians, followed by Marriage & Family Therapist with 185 and Counselor with 54). 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, Petaluma reports roughly 4.8 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, Addiction (Substance Use Disorder) Counselor is the most prominent one with no provider currently listing a Petaluma practice address, a coverage gap Petaluma patients typically fill by traveling to a larger nearby hub.

For Petaluma 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 Petaluma, CA?

There are 1,856 registered healthcare providers in Petaluma, CA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Petaluma?

The most common specialties in Petaluma are Behavior Technician, Marriage & Family Therapist, Counselor, Family Nurse Practitioner, Other Technician. Behavior Technician has the most providers with 549.

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.