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 25 of 38.
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
- Rachael NewmanMarriage & Family Therapist1245605450
- Sarah NewmanBehavior Technician1104647692
- Huong NgoPharmacist1942741509
- Eric NguyenPharmacist1750938015
- Kant NguyenBehavior Technician1699330951
- Lana Nguyen, M.D.Family Medicine Physician1023043494
- Trang NguyenBehavior Technician1124500491
- Wenjamin Nguyen-GilmoreBehavior Technician1093678880
- Maya Nicholls, CMTSpecialist1356601033
- Ann Nicol, FNPFamily Nurse Practitioner1720010580
- Dana Niendorf, MDUrology Physician1588674147
- Katherine Nies, LCSWClinical Social Worker1922828458
- Samuel Nieves, IDHSIndependent Duty Corpsman1922815547
- Kittrena NiuAssistant Behavior Analyst1124524509
- Robin Nixon, LMFTMarriage & Family Therapist1881948685
- Mark Nizibian, D.D.S.Dentist1023386638
- Alisha NoelBehavior Technician1336791821
- Blake NoglebergRehabilitation Practitioner1962389122
- Nudrat NooraniBehavior Technician1043879455
- Mark Northfield, MDOrthopaedic Surgery Physician1861406316
- Brooke Norton, PSYDClinical Psychologist1780106948
- Andrea Nortz, MFTMarriage & Family Therapist1336466721
- Carolina Noya, RN,NPFamily Nurse Practitioner1255583506
- Austin Nunez, DDS, MPHPediatric Dentistry1922319169
- Jasmine NunezBehavior Technician1902698889
- Mariano NunezBehavior Technician1457145872
- Mariena NunneryMedical Technologist1093830481
- Danielle O'Cop, M.S., CCC-SLPSpeech-Language Pathologist1841861838
- Christine O'Meara, PTPhysical Therapist1205165198
- Alexander ObermanOrthopedic Physical Therapist1275098071
- Jessica ObrienDay Training/Habilitation Specialist1972481372
- Maria Ochoa, MDFamily Medicine Physician1841410461
- Braulio Ochoa-Montal, PA-CPhysician Assistant1831741198
- Kathryn Oconnor, DCChiropractor1508997602
- Jason OdenthalBehavior Technician1053064964
- Nicholas OeserPsychologist1396098133
- Karen OjedaAssistant Behavior Analyst1396233326
- Jennifer Okonsky, RN, NP, PHDAdult Health Nurse Practitioner1306635024
- Jordan Olenberger, OTR/LOccupational Therapist1568822096
- Kate Oliver, CMTMassage Therapist1477167948
- Jerri OllettCase Manager/Care Coordinator1932972635
- Gunner Olsen, PHARM DPharmacist1548523509
- Stephen OmondiBehavior Technician1154834695
- Jessica OrdazBehavior Technician1770135170
- Juan Ordonez HernandezRehabilitation Practitioner1801775614
- Isabella OrleanBehavior Technician1861332637
- Dana OrlenOther Technician1528215951
- Mark OrlowskiIndependent Duty Corpsman1902677503
- Diane Orsini Tarkman, OTR/LPediatric Occupational Therapist1952574568
- Marina Ortega, PHYSICIAN ASSISTANTPhysician Assistant1316309438
The largest California cities
- Los Angeles69,537
- San Diego52,937
- San Francisco38,143
- Sacramento33,083
- San Jose20,925
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.