NPPES file of Aug 9, 2026

Doctors and health care providers in Naperville, IL

4,634 individual NPPES records list a practice address in Naperville, 3rd of 541 Illinois cities. The largest group is professional counselor: 329, 7% of the city's records, against 4% across Illinois. Page 60 of 93.

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

The 8 largest groups in Naperville

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

Naperville in Illinois

  • Rank in Illinois3rd of 541 cities by records
  • Share of the state1.9% of Illinois's records
  • Specialties present25 or more taxonomy codes
  • Top three groups19.4% of all records
  • Professional Counselor rank2nd of the 10 Illinois cities with the most

Compared with Illinois as a whole, Naperville has 2.1× the state's share of behavior analyst records and 0.54× its share of internal medicine physician records.

Providers in Naperville, alphabetically

  1. Jennifer NowaczykBehavior Technician1265131981
  2. Anne Nowakowski, M.S., CCC-SLP/LSpeech-Language Pathologist1710498100
  3. Nefertiti Nowell, PHDProfessional Counselor1659344828
  4. Maria Donna Mae NucumDevelopmental Therapist1851532618
  5. Elisabeth Nuesser, C-IAYTHealth & Wellness Coach1114611647
  6. Timothy Nugent, D.D.S.Dentist1902236763
  7. Asma Numera, DDSDentist1508193764
  8. Jennifer Nunn, DPTPhysical Therapist1104252923
  9. Carla Nutter, PA-CSurgical Physician Assistant1013192046
  10. Juliana Nwauwa, NPPsychiatric/Mental Health Nurse Practitioner1972004422
  11. Laura NylenDevelopmental Therapist1700139607
  12. Erin O'Callaghan, OTR/LOccupational Therapist1962156323
  13. Carolyn O'Connor, PA-CMedical Physician Assistant1881929313
  14. Kelsey O'Connor, APN-CNPNurse Practitioner1083432660
  15. Susan O'Connor, NP-CFamily Nurse Practitioner1992297899
  16. Samantha O'Dell, APNWomen's Health Nurse Practitioner1346854049
  17. Cynthia O'Donnell, LCSWClinical Social Worker1124294137
  18. Sara O'HareBehavior Technician1033717756
  19. Brian O'Leary, MDInternal Medicine Physician1295702439
  20. Seanna O'Malley, DPTPhysical Therapist1326359191
  21. Kelly O'Neill, DCChiropractor1851606495
  22. Susan O'Neill, NPFamily Nurse Practitioner1659385722
  23. Bailey O'RilleyCounselor1578162608
  24. Tracy O'Rorke, PHARM DPharmacist1760161855
  25. Patricia O'Sullivan, M.ED.Developmental Therapist1578843587
  26. Jennifer Obazee, PMHNPPsychiatric/Mental Health Nurse Practitioner1538021878
  27. Kylie Obbish, LPCMental Health Counselor1538828074
  28. Shannon ObedMental Health Counselor1700567054
  29. Christian OberheideChiropractor1841346657
  30. Adam OberhofferProfessional Counselor1306382437
  31. Kayla Obernesser, PA-CPhysician Assistant1124754486
  32. Michelle OblaznyBehavior Technician1457241309
  33. Felix ObregonInternal Medicine Physician1831271709
  34. Melanie OchoaClinical Social Worker1689292682
  35. Nora Ochoa, MS LCPCMental Health Counselor1851841779
  36. Osvaldo OchoaBehavior Technician1245184282
  37. Stephanie OchoaClinical Social Worker1386299642
  38. Mohammad OdehDriver1275006611
  39. Briana OdenDoula1326842642
  40. Patrick Odonnell, MDFamily Medicine Physician1831186964
  41. Robert Odonnell, DDSEndodontics1457446221
  42. Hobert Ogilvie, LCPCProfessional Counselor1285760249
  43. Olivia Ogle, PA-CPhysician Assistant1982407110
  44. Raymond Ogren, A.T.C.Specialist1902882640
  45. Mobolaji Ogunmodede, COTAOccupational Therapy Assistant1144843129
  46. Thomas Oh, M.D.Emergency Medicine Physician1033275276
  47. Madeline OhanlonMental Health Counselor1922986686
  48. Darcy Ojeda, DCChiropractor1962164186
  49. James Ojjeh, D.M.D.General Practice Dentistry1235142852
  50. Wambui OjoOccupational Therapist1649849233

The largest Illinois cities

  1. Chicago63,379
  2. Springfield4,997
  3. Peoria4,621
  4. Evanston4,013
  5. Rockford3,893

All of Illinois →

How to read this directory

Naperville, Illinois appears in the CMS National Plan and Provider Enumeration System with 4,634 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 Naperville - 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 Naperville 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 Naperville is weighted toward Professional Counselor (329 clinicians, followed by Clinical Social Worker with 307 and Physical Therapist with 263). 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 Illinois's population, Naperville reports roughly 36.9 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 Illinois's most common specialties, Student in an Organized Health Care Education/Training Program is the most prominent one with no provider currently listing a Naperville practice address, a coverage gap Naperville patients typically fill by traveling to a larger nearby hub.

For Naperville 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 Naperville, IL?

There are 4,634 registered healthcare providers in Naperville, IL, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Naperville?

The most common specialties in Naperville are Professional Counselor, Clinical Social Worker, Physical Therapist, Behavior Technician, Speech-Language Pathologist. Professional Counselor has the most providers with 329.

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.