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 14 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. Nancy Grover, LCSWClinical Social Worker1821145038
  2. Brian GuadarramaBehavior Technician1629623632
  3. Azaria GuernonBehavior Technician1043107279
  4. Giannella Guerrero CardenasBehavior Technician1750062519
  5. Maria Guerrero ChavezBehavior Technician1821570979
  6. Jillian GuevaraBehavior Technician1245731454
  7. Mikaela GuevarraStudent in an Organized Health Care Education/Training Program1700707098
  8. Alexis GumandayBehavior Technician1134978216
  9. Sabina Gupta Sud, D.M.D., M.S.Dentist1851528939
  10. Cassandra GurjaoCounselor1891257572
  11. Clover Gutermuth, LM, IBCLCMidwife1316644172
  12. Grecia Gutierrez, B.SBehavior Technician1730657651
  13. Matthew GutierrezBehavior Technician1225910672
  14. Navidad GutierrezBehavior Technician1629638192
  15. Morgen GuzmanBehavior Technician1356217822
  16. Katelyn Hackett, EMTRehabilitation Practitioner1497638415
  17. Alan Hadland, MDPain Medicine Physician1811120272
  18. Linda Haechler, RN,MFTMarriage & Family Therapist1538382361
  19. Janette Hager, CRNFARegistered Nurse1477555944
  20. Karen Hall, PTAPhysical Therapy Assistant1386322600
  21. Patricia Hallenbeck, MFTMarriage & Family Therapist1053302687
  22. Kaylynn HalvorsenBehavior Technician1316872716
  23. Fasih Hameed, MDFamily Medicine Physician1417083031
  24. Odeya HamiterAssistant Behavior Analyst1982551016
  25. Craig Hamley, P.T. O.C.S.Orthopedic Physical Therapist1790860542
  26. Renee Hamley, DPTPhysical Therapist1790275055
  27. Kristin HammackBehavior Technician1588165757
  28. Leslie Hammer, ASWCounselor1982005013
  29. Ronald Hammer, D.C.Chiropractor1972517449
  30. Jennifer Hammer-CoddChiropractor1821544305
  31. Cameron HamptonMental Health Counselor1770403602
  32. Miyah HamptonBehavior Technician1861257750
  33. Kari HanaBehavior Technician1609333442
  34. Erin Hanauer, PA-CMedical Physician Assistant1851490718
  35. Jacqueline HanleyFamily Nurse Practitioner1982483152
  36. Ryan HanselmanRespiratory/Developmental/Rehabilitative Specialist/Technologist1083571848
  37. Forrest Hansen, RBTBehavior Technician1639670797
  38. Leslie Hansen, MFTMarriage & Family Therapist1669560272
  39. Lisa Harb, DPTPhysical Therapist1215576020
  40. Sean Hardcaslte, DVMSpecialist1285096008
  41. Eleanor HardingCounselor1487062014
  42. Tammy HardingBehavior Technician1053068148
  43. Arthur HarnischBehavior Technician1568320026
  44. Annabel HarperBehavior Technician1669965711
  45. Kara Harris, RDN, CSGRegistered Dietitian1477161370
  46. Kimberly Harris, MAMarriage & Family Therapist1669842878
  47. Lindsey Harris, OTRPhysical Rehabilitation Occupational Therapist1619235116
  48. Rachel HarrisBehavior Technician1275091761
  49. Ronald Harris, O.D.Optometrist1437159803
  50. Sheryl HarrisPharmacist1184037426

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.