NPPES file of Aug 9, 2026

Doctors and health care providers in Winchester, MA

439 individual NPPES records list a practice address in Winchester, 96th of 406 Massachusetts cities. The largest group is clinical social worker: 34, 8% of the city's records, against 8% across Massachusetts. Page 7 of 9.

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

Winchester in Massachusetts

  • Rank in Massachusetts96th of 406 cities by records
  • Share of the state0.2% of Massachusetts's records
  • Specialties present25 or more taxonomy codes
  • Top three groups16.4% of all records

Compared with Massachusetts as a whole, Winchester has 14× the state's share of pediatric dentistry records and 0.43× its share of mental health counselor records.

Providers in Winchester, alphabetically

  1. Elizabeth O'ConnorSocial Worker1275411282
  2. Joan O'Connor, D.M.D.Orthodontics and Dentofacial Orthopedics Dentistry1700940046
  3. Kyle O'Connor, RPHPharmacist1366034126
  4. Meghan O'ConnorPhysical Therapist1336964667
  5. Joseph O'Donnell, D.M.D.Pediatric Dentistry1023102050
  6. Flora Ocampo, DDSOral and Maxillofacial Surgery (Dentist)1467592204
  7. Joanne Oh, M.D.Pain Medicine (Anesthesiology) Physician1679511950
  8. Matthew OliverCertified Registered Nurse Anesthetist1609434521
  9. Van Orenstein, D.M.D.Pediatric Dentistry1134432206
  10. Marissa Osorio, WHNPWomen's Health Nurse Practitioner1770273591
  11. Sarah Packard, LICSWClinical Social Worker1962736751
  12. Peter Pantano, D.D.S.Dentist1134199268
  13. Erik ParenaCertified Registered Nurse Anesthetist1487920328
  14. Annie Parker, MDPulmonary Disease Physician1144204066
  15. Dilip Patel, MDAnesthesiology Physician1689631186
  16. Sean Pearlman, RBTBehavior Analyst1144813841
  17. Gabriella PedutoRegistered Nurse1093670366
  18. Joshua Penn, MDEmergency Medicine Physician1811169394
  19. Rory Petteys, MDNeurological Surgery Physician1558596627
  20. Marie Natacha PilorgeBehavior Technician1992410120
  21. Noel Poirier, MACAcupuncturist1134673890
  22. Wellner Poppe, M.D.Family Medicine Physician1548238157
  23. Sarah Powers, RDRegistered Dietitian1649826058
  24. Christopher Quartararo, M.D.Anesthesiology Physician1558476515
  25. Paul Radvany, M.D.Cardiovascular Disease Physician1609832492
  26. Revathi Ramaswamy, MDAnesthesiology Physician1376654863
  27. Yolanda RamseurClinical Social Worker1578824272
  28. Frederic Ramsey, MDAnesthesiology Physician1962576140
  29. Madeline Randolph, PA-CPhysician Assistant1578117032
  30. Kathryn ReboulClinical Social Worker1962268235
  31. William Reed, DMDEndodontics1265691539
  32. Viviana Reyes Pinzon, MDPulmonary Disease Physician1033736004
  33. Le Grand Reynolds, MD, MBAEmergency Medicine Physician1558564096
  34. Alayna Richardson, N.P.Family Nurse Practitioner1700111820
  35. Sybil RichardsonClinical Social Worker1215293485
  36. Traci Ring, MS CCC AAudiologist1013984632
  37. Alison Robbins, PA-CPhysician Assistant1265741722
  38. Hilda Rock, M.D.Family Medicine Physician1477971976
  39. Steven Rosen, M.D.Neurology Physician1245379734
  40. Constance RosenbergerRegistered Nurse1184742165
  41. Phyllis Ross, L.I.C.S.WMental Health Counselor1497849079
  42. Joel Rubinstein, M.D.Psychiatry Physician1508952300
  43. Thomas Russo, D.M.D.Dentist1285836452
  44. Edward Ryan, MDOphthalmology Physician1083613186
  45. Marie Saba, MSW, LICSWClinical Social Worker1073119541
  46. Emily Samaha, MDFamily Medicine Physician1811300353
  47. Morgan Santhamoorthy, M.D.Family Medicine Physician1952750242
  48. Laura Saporito, RDRegistered Dietitian1780898619
  49. Polly Sawyer, LICSWClinical Social Worker1467211151
  50. Scott Schluter, MDPediatrics Physician1235112863

The largest Massachusetts cities

  1. Boston41,865
  2. Worcester13,166
  3. Springfield8,553
  4. Cambridge5,145
  5. Brockton4,287

All of Massachusetts →

How to read this directory

Winchester, Massachusetts appears in the CMS National Plan and Provider Enumeration System with 439 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 Winchester - 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 Winchester 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 Winchester is weighted toward Clinical Social Worker (34 clinicians, followed by Physical Therapist with 19 and Internal Medicine Physician with 19). 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 Massachusetts's population, Winchester reports roughly 6.3 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 Massachusetts's most common specialties, Behavior Technician is the most prominent one with no provider currently listing a Winchester practice address, a coverage gap Winchester patients typically fill by traveling to a larger nearby hub.

For Winchester 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 Winchester, MA?

There are 439 registered healthcare providers in Winchester, MA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Winchester?

The most common specialties in Winchester are Clinical Social Worker, Physical Therapist, Internal Medicine Physician, Anesthesiology Physician, Mental Health Counselor. Clinical Social Worker has the most providers with 34.

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.