NPPES file of Aug 9, 2026

Doctors and health care providers in Lowell, MA

2,992 individual NPPES records list a practice address in Lowell, 10th of 406 Massachusetts cities. The largest group is mental health counselor: 374, 13% of the city's records, against 8% across Massachusetts. Page 41 of 60.

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

The 8 largest groups in Lowell

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

Lowell in Massachusetts

  • Rank in Massachusetts10th of 406 cities by records
  • Share of the state1.4% of Massachusetts's records
  • Specialties present25 or more taxonomy codes
  • Top three groups28.5% of all records

Compared with Massachusetts as a whole, Lowell has 9.1× the state's share of peer specialist records and 0.61× its share of physician assistant records.

Providers in Lowell, alphabetically

  1. James O'KeefeCounselor1639689839
  2. Micaela O'KeefeMental Health Counselor1578010898
  3. William O'Meara, M.D.Radiation Oncology Physician1598886897
  4. Ann O'NeilSpeech-Language Pathologist1235311754
  5. Susan O'Neil, LICSWClinical Social Worker1265470124
  6. Neil O'Regan, MDObstetrics & Gynecology Physician1457311821
  7. Jennifer O'Shea, M.D.Pediatrics Physician1942264387
  8. Zachary O'Steen, M. ED.Counselor1992938955
  9. Charlotte O'ToolePediatric Physical Therapist1366623498
  10. Olivia O'TooleMental Health Counselor1457145765
  11. Jessica OarCommunity Health Registered Nurse1508225236
  12. Annastecia OdoLicensed Practical Nurse1407635675
  13. Melissa OdoughertySpecialist1114350378
  14. Ash OertelBehavior Technician1275378754
  15. Samson OgbeideBehavior Technician1609675503
  16. Leza Ogren, LICSWClinical Social Worker1518196161
  17. Stanislaus OguMental Health Counselor1346111713
  18. Susan Ohlson, MS, CCC-SLPSpeech-Language Pathologist1538412135
  19. Olubunmi Okeke, RNRegistered Nurse1770055188
  20. Theophilus OkoeBehavior Technician1093638645
  21. Adewumi Oladele, MBCHB, M.ED, DRPHMental Health Counselor1477330512
  22. Janet Olden, L.M.H.C.Mental Health Counselor1366565079
  23. Julia Oleary, OTR/LOccupational Therapist1841057940
  24. Kevin Oleary, PSYDClinical Psychologist1073109328
  25. Ashley Olejarz, LMHCMental Health Counselor1811331887
  26. Lisa OlingerMental Health Counselor1154582021
  27. Adetokunbo Olotu, M.D.Pediatrics Physician1538332861
  28. Kathryn Olson, M.D.Specialist1336136159
  29. Kelsey Olson, FNP-CNurse Practitioner1255141792
  30. Lori Olson, LPNLicensed Practical Nurse1053746693
  31. Nwanne Olu, LPNLicensed Practical Nurse1821837899
  32. Molly OmuraSpeech-Language Pathologist1366625386
  33. Carol Oneil, PTPhysical Therapist1265693626
  34. Jonathan Oppenheim, MDEmergency Medicine Physician1720152085
  35. Leakhena Or, R.N.Registered Nurse1770811994
  36. Angela OriakhiGeneral Practice Registered Nurse1679281018
  37. Brad Oriel, MDVascular Surgery Physician1760776124
  38. Lisa Orlando, CPNP, PMHSPsychiatric/Mental Health Nurse Practitioner1164498929
  39. Andrew OrmondeCounselor1073054185
  40. Nycollette OrtizBehavior Technician1184295180
  41. Vianise Ortiz, BSMental Health Counselor1770822199
  42. Yashira OrtizBehavior Technician1447071816
  43. Rexford OsaeMental Health Counselor1851066831
  44. Catalina Osses Albornoz, DDSGeneral Practice Dentistry1164007811
  45. Moruph Osuolale, RNRegistered Nurse1205649993
  46. Victory OtaruBehavior Technician1346068814
  47. Alyssa OteroStudent in an Organized Health Care Education/Training Program1023467669
  48. Victor OteroPeer Specialist1073478061
  49. Kristina OuellettePharmacist1679225353
  50. Lerna Ozcan, M.D.Surgery Physician1558654707

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

Lowell, Massachusetts appears in the CMS National Plan and Provider Enumeration System with 2,992 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 Lowell - 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 Lowell 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 Lowell is weighted toward Mental Health Counselor (374 clinicians, followed by Clinical Social Worker with 248 and Counselor with 230). 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, Lowell reports roughly 42.7 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 Lowell 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 Lowell, MA?

There are 2,992 registered healthcare providers in Lowell, MA, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Lowell?

The most common specialties in Lowell are Mental Health Counselor, Clinical Social Worker, Counselor, Behavior Technician, Social Worker. Mental Health Counselor has the most providers with 374.

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.