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 177 of 264.
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
- Katie O'Brien, NPDermatology Physician1801048921
- Kaylee O'BrienBehavior Analyst1043180912
- Kaylin O'Brien, MS, GCGenetic Counselor (M.S.)1336622661
- Lauren O'Brien, PASurgical Physician Assistant1447897020
- Maryellen O'Brien, LMHCMental Health Counselor1902284458
- Sarah O'Brien, FNPNurse Practitioner1558694760
- Elizabeth O'Callahan, LMHC, BCBA, LABAMental Health Counselor1548531916
- Taylin O'Coin, MACounselor1073033932
- George O'ConnellMental Health Counselor1932632320
- Lauren O'Connell, ACNP-BCNurse Practitioner1811120603
- Megan O'ConnellBehavior Technician1760260194
- Trisha O'Connell, LMHCMental Health Counselor1376741637
- Chelsey O'ConnorCounselor1164082954
- Colette O'Connor, ACNPC-AGNurse Practitioner1003653700
- Diane O'Connor, R.N.Registered Nurse1578847711
- Isabella O'ConnorBehavior Technician1710578794
- Jennifer O'ConnorDevelopmental Therapist1083165427
- Jessica O'ConnorOccupational Therapist1902344138
- John O'Connor, M.D.Anesthesiology Physician1295988921
- June O'Connor, M.D.Obstetrics & Gynecology Physician1336130657
- Katie O'ConnorDevelopmental Therapist1457883597
- Kerry O'Connor, N.P.Adult Health Nurse Practitioner1548451156
- Kristen O'ConnorAudiologist1104952365
- Laurel O'Connor, MDEmergency Medicine Physician1982099883
- Margret O'Connor, CNPFamily Nurse Practitioner1114887460
- Mark O'Connor, M.D.Endocrinology, Diabetes & Metabolism Physician1518300284
- Samantha O'ConnorDevelopmental Therapist1487174413
- Sean O'ConnorBehavior Technician1033999313
- Daniel O'Day, D.C.Orthopedic Chiropractor1386667079
- Kevin O'Day, M.D.Cardiovascular Disease Physician1255793220
- Katharine O'Dell, NPNurse Practitioner1144201195
- Phylicia O'Dell, BSWSocial Worker1598483877
- Mary O'Donnell, OTR/LOccupational Therapist1609380765
- Patrick O'Donnell, DOAnatomic Pathology Physician1942415294
- Richard O'Garr, M.A.Mental Health Counselor1982749636
- Cynthia O'GradyBehavior Technician1093384612
- John O'Grady, PA-CPhysician Assistant1083689020
- Erin O'Hearn, MSW, LICSWClinical Social Worker1225166887
- Lauryn O'Keefe, DPTPhysical Therapist1437758166
- Erin O'Kula, MDEmergency Medicine Physician1154732352
- Alicia O'Leary, LMHCMental Health Counselor1134554082
- Kathleen O'Leary, O.D.Optometrist1790072650
- Madeleine O'Leary, MDStudent in an Organized Health Care Education/Training Program1467193417
- Maureen O'Leary, MAMental Health Counselor1285013946
- Melanie O'Leary, B.SCognitive & Behavioral Psychologist1437421971
- Jennifer O'Leary Tait, PH.D.Clinical Psychologist1982845061
- Caitlin O'LoughlinCertified Registered Nurse Anesthetist1649734484
- Rosemary O'Malley-CannOccupational Therapist1871620195
- Anna O'Neal, CNPNurse Practitioner1346789997
- Lynn O'Neal, NPNurse Practitioner1841251261
The largest Massachusetts cities
- Boston41,865
- Springfield8,553
- Cambridge5,145
- Brockton4,287
- Milford3,459
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.