NPPES file of Aug 9, 2026

Doctors and health care providers in Worcester, MA

13,166 individual NPPES records list a practice address in Worcester, 2nd of 406 Massachusetts cities. The largest group is behavior technician: 1,487, 11% of the city's records, against 5% across Massachusetts. Page 180 of 264.

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

The 8 largest groups in Worcester

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

Worcester in Massachusetts

  • Rank in Massachusetts2nd of 406 cities by records
  • Share of the state6% of Massachusetts's records
  • Specialties present25 or more taxonomy codes
  • Top three groups26.2% of all records
  • Behavior Technician rank2nd of the 10 Massachusetts cities with the most

Compared with Massachusetts as a whole, Worcester has 2.4× the state's share of nurse practitioner records and 0.52× its share of physical therapist records.

Providers in Worcester, alphabetically

  1. Nancy Oliver, O.T.R/LOccupational Therapist1285936831
  2. Beatriz Olivera Rodriguez, MDDiagnostic Radiology Physician1982231213
  3. Ashley OliveriSocial Worker1437708203
  4. Pittsma OlivierDevelopmental Therapist1386148930
  5. William Olivier, LICSWClinical Social Worker1275864761
  6. Anna Olivo, NP-CFamily Nurse Practitioner1326569450
  7. Annie Ollila, MSW LICSWClinical Social Worker1417211038
  8. Miguel Olmedo, DNPNurse Practitioner1154333920
  9. Abigale OlmstedBehavior Technician1619562097
  10. Adedoja OlogunterePsychiatric/Mental Health Nurse Practitioner1124880976
  11. Katherine Olshan, MDPediatric Gastroenterology Physician1932596855
  12. Carolann Olson, MS, CCC-SLPSpeech-Language Pathologist1134582430
  13. David Olson, M.D.Psychiatry Physician1982687679
  14. Erik Olson, PA-CPhysician Assistant1992375398
  15. Hayleigh OlsonBehavior Technician1518886621
  16. Jenna OlsonBehavior Analyst1033808571
  17. Marianne Olson, LPNLicensed Practical Nurse1952550964
  18. Megan OlsonBehavior Technician1093414203
  19. Opeoluwa Olukorede, MDStudent in an Organized Health Care Education/Training Program1053015826
  20. Tope Oluwa, MSWClinical Social Worker1457476210
  21. Amos OmelerDevelopmental Therapist1114467651
  22. Abdulkadir Omer, MDEndocrinology, Diabetes & Metabolism Physician1750548996
  23. Rekia Omer, RNRegistered Nurse1235578170
  24. Izabela Omondi, NPFamily Nurse Practitioner1326351453
  25. Maryam Omran, MDStudent in an Organized Health Care Education/Training Program1235833385
  26. Stephanie OmuemuRegistered Nurse1609159342
  27. Mark OnderdonkDevelopmental Therapist1952710469
  28. Eve OneyBehavior Technician1669338406
  29. Sarah OnoratoDevelopmental Therapist1164610150
  30. Stephanie OnweBehavior Technician1538034301
  31. Nneka Onwubueke, M.D.Internal Medicine Physician1518949767
  32. Jennifer Onwuka, RNPsychiatric/Mental Health Nurse Practitioner1679044127
  33. Mercy OnwukaBehavior Technician1083536262
  34. Brianna OnyiorahBehavior Technician1174298970
  35. Ronald OparaDevelopmental Therapist1154820611
  36. Anisa OparakuPharmacist1871141846
  37. Michelle OpareStudent in an Organized Health Care Education/Training Program1124969878
  38. Mary Opatka, R.N.Registered Nurse1033255658
  39. Daniel OpokuBehavior Technician1114846763
  40. Dennis Opoku TwumasiBehavior Technician1912718685
  41. Florence Opoku-FofieMental Health Counselor1306773874
  42. Ransford OpongCommunity Health Registered Nurse1356063960
  43. Bertha OppongRegistered Nurse1649950619
  44. Gifty OppongCommunity Health Registered Nurse1669106381
  45. Desiree OquendoDevelopmental Therapist1134640857
  46. Margarita OquendoBehavior Technician1659956829
  47. Shahira Orcel, RD, LDN, CNSCRegistered Dietitian1790327450
  48. David OrellanaBehavior Technician1124945100
  49. Terra Organisciak, PA-CPhysician Assistant1396592259
  50. Brandel OrhinBehavior Technician1003644923

The largest Massachusetts cities

  1. Boston41,865
  2. Springfield8,553
  3. Cambridge5,145
  4. Brockton4,287
  5. Milford3,459

All of Massachusetts →

How to read this directory

Worcester, Massachusetts appears in the CMS National Plan and Provider Enumeration System with 13,166 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 Worcester - 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 Worcester 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 Worcester is weighted toward Behavior Technician (1,487 clinicians, followed by Student in an Organized Health Care Education/Training Program with 1,031 and Mental Health Counselor with 929). 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, Worcester reports roughly 188 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 Worcester 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 Worcester, MA?

There are 13,166 registered healthcare providers in Worcester, MA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Worcester?

The most common specialties in Worcester are Behavior Technician, Student in an Organized Health Care Education/Training Program, Mental Health Counselor, Developmental Therapist, Clinical Social Worker. Behavior Technician has the most providers with 1,487.

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.