NPPES file of Aug 9, 2026

Doctors and health care providers in Fairfax, VA

6,584 individual NPPES records list a practice address in Fairfax, 4th of 351 Virginia cities. The largest group is clinical social worker: 421, 6% of the city's records, against 5% across Virginia. Page 89 of 132.

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

The 8 largest groups in Fairfax

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

Fairfax in Virginia

  • Rank in Virginia4th of 351 cities by records
  • Share of the state4.4% of Virginia's records
  • Specialties present25 or more taxonomy codes
  • Top three groups18% of all records
  • Clinical Social Worker rank3rd of the 10 Virginia cities with the most

Compared with Virginia as a whole, Fairfax has 7.6× the state's share of school social worker records and 0.40× its share of student in an organized health care education/training program records.

Providers in Fairfax, alphabetically

  1. Jeanmarie O'Sullivan, MSWSchool Social Worker1811522683
  2. Rachel Oakes, PHDClinical Psychologist1376478446
  3. Harvey Oaklander, PH.D.Clinical Psychologist1659377448
  4. Sadaf ObaidySurgical Assistant1770325912
  5. Maria Obeid, DNP, AGNP-BCAdult Health Nurse Practitioner1467850024
  6. Nwamaka Obi, MDMaternal & Fetal Medicine Physician1437324407
  7. Lynn Obrien, MDFamily Medicine Physician1164418000
  8. Daniela Ochoa Paz, LMSWSchool Social Worker1932022860
  9. Camrey Oczkowski, LGPC, ATRProfessional Counselor1487119368
  10. Mary Oddoux, MSW, LCSWClinical Social Worker1174239685
  11. Walter Odisho, DDSProsthodontics1710362447
  12. Windi OehmsSchool Psychologist1225532484
  13. Mun Sik OhBehavior Technician1154270007
  14. Tae OhMental Health Counselor1326712340
  15. Taylor Oh, MS.D.Acupuncturist1861847386
  16. Jamie Ohriner, M.D.Pediatrics Physician1659374338
  17. William Ohriner, M.D.Pediatrics Physician1932102712
  18. Hannah Ojard, MSW, LCSWClinical Social Worker1467884411
  19. Mamta Ojha, M.D.Internal Medicine Physician1215220389
  20. Nkiru Okonkwo, RPHPharmacist1215764592
  21. Ugochi Okoroafor-Ridgway, MDOrthopaedic Surgery Physician1629414339
  22. Vickie Okoye, M.S.W.School Social Worker1235627738
  23. Yaa OkrahPhysical Therapy Assistant1083194856
  24. Christiana OlabanjiOccupational Therapist1376046904
  25. Ifeanyi Olele, D.OPsychiatry Physician1194132407
  26. Julian OleyProfessional Counselor1578438008
  27. Jaqueline Oliveira Baroni, LMHC, LPCProfessional Counselor1417613795
  28. Emily OliverSchool Psychologist1750990289
  29. Kathryn Oliver, FNP-BCFamily Nurse Practitioner1225965098
  30. Patrick Oliverio, MDDiagnostic Radiology Physician1700804564
  31. Emily OlivonBehavior Technician1790638112
  32. Raymond Olkin, DPMPodiatrist1386641959
  33. Mary OlsenSchool Psychologist1134626948
  34. Johanna OlsonSpeech-Language Pathologist1720638729
  35. Fola Oluwehinmi, MDGeriatric Medicine (Internal Medicine) Physician1912017690
  36. Danielle Omar, RDRegistered Dietitian1508788621
  37. Suhaila OmarPharmacy Technician1255721023
  38. Murad Omery, M.D.Neurology with Special Qualifications in Child Neurology Physician1689053712
  39. Ori OnaziMental Health Counselor1497406920
  40. Elena OndekBehavior Technician1811847072
  41. Adam Oneill, PA-CPhysician Assistant1689224107
  42. Laura Oneill, LPCProfessional Counselor1356086722
  43. Erin Ong, M.D/M.S.Ophthalmology Physician1346773389
  44. Ashlee Ong Musngi, P.A.Physician Assistant1942768361
  45. Oladapo Onijala, PHARMD.Pharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1598044042
  46. Amara Onyekwere, BCBABehavior Analyst1255828430
  47. Debra OpaleskySpeech-Language Pathologist1023514890
  48. Mercy OparaFamily Nurse Practitioner1598630378
  49. Tracey Opoku, ATCAthletic Trainer1073900254
  50. Michael Oppenheimer, D.M.D.Periodontics1639172620

The largest Virginia cities

  1. Richmond14,083
  2. Virginia Beach9,147
  3. Charlottesville7,000
  4. Norfolk5,993
  5. Alexandria5,424

All of Virginia →

How to read this directory

Fairfax, Virginia appears in the CMS National Plan and Provider Enumeration System with 6,584 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 Fairfax - 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 Fairfax 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 Fairfax is weighted toward Clinical Social Worker (421 clinicians, followed by Behavior Technician with 401 and Speech-Language Pathologist with 361). 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 Virginia's population, Fairfax reports roughly 76.2 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.

For Fairfax 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 Fairfax, VA?

There are 6,584 registered healthcare providers in Fairfax, VA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Fairfax?

The most common specialties in Fairfax are Clinical Social Worker, Behavior Technician, Speech-Language Pathologist, Professional Counselor, Physical Therapist. Clinical Social Worker has the most providers with 421.

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.