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 69 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. Cyiara RajamanickamBehavior Technician1639918550
  2. Zainab Raji Osobu, MDEmergency Medicine Physician1720432081
  3. Anand Ramanathan, MDInterventional Cardiology Physician1306892229
  4. Brittany Ramenani, LCSWClinical Social Worker1427724442
  5. Dalilah RamirezBehavior Technician1326900713
  6. Evelyn RamirezCounselor1205574001
  7. Katrina RamirezMental Health Counselor1306220074
  8. Lisully Ramirez, LSWClinical Social Worker1033924261
  9. Mark RamirezProfessional Counselor1356337612
  10. Zenyazlen RamirezBehavior Technician1619831823
  11. Jhoanna Ramiro, PTAPhysical Therapy Assistant1962170118
  12. Joanna Mari Ramos, PHARMDPharmacist1861165748
  13. Monica Ramos, M.D.Neonatal-Perinatal Medicine Physician1831483429
  14. Sydney RamsbottomMental Health Counselor1013738640
  15. Roy Ramsey, M.D.Diagnostic Radiology Physician1619203940
  16. Kanchan RanaPhysical Therapist1699212423
  17. Snaha Rana, ODOptometrist1801552054
  18. Sangita Rangala, M.D.Emergency Medicine Physician1023167327
  19. Maria RangelDoula1356118723
  20. Heather Ranneklev, LCSWClinical Social Worker1609638287
  21. Jennifer RansteadOccupational Therapist1275823189
  22. Shoaib Rao, MDPediatrics Physician1871089441
  23. Sujata Raol, PHARMDPharmacist1366710568
  24. Sean Rardin, M.D.Family Medicine Physician1225020076
  25. Adam Ratner, LCSWCounselor1023426848
  26. Megan Raupp, MS, RD, LDNRegistered Dietitian1316496516
  27. Tennile RayMarriage & Family Therapist1164774170
  28. Arwa RazaAnesthesiology Physician1093398729
  29. Asma RazikClinical Social Worker1093511602
  30. Gabriela RealzolaOccupational Therapist1477878528
  31. Pamela Rebeck, PHDClinical Psychologist1497740070
  32. Bryan Rebhan, LCPCProfessional Counselor1871963181
  33. Prerana Reddy, M.D.Hospitalist Physician1114453446
  34. Shantan Reddy, MD MPHOphthalmology Physician1881724995
  35. Shruthi Reddy, M.D.Dermatology Physician1235364092
  36. Amy Reeb, NP-CFamily Nurse Practitioner1033549894
  37. Chara Reed, PHARM DPharmacist1457636011
  38. Sara Reed, L.C.S.WClinical Social Worker1124548441
  39. Grace Reetz, PA-CPhysician Assistant1215771977
  40. Cassie Reeves, ODOptometrist1508394008
  41. Anthony Reganato, DDSDentist1366679078
  42. Amanpreet Rehal, DPTPhysical Therapist1225749559
  43. Falak RehanPharmacist1568030971
  44. Ruth Anne Rehfeldt, BCBA-D, PHDBehavior Analyst1225631690
  45. David Rehn, M.D.Anesthesiology Physician1194772582
  46. Michelle Reich, RDN, CDCESRegistered Dietitian1245951003
  47. Michael Reicherts, MDPediatrics Physician1679536007
  48. Richard Reid, DDSDentist1922138544
  49. John Reifenstuhl, LCSWClinical Social Worker1174636211
  50. John Reilly, M.D.Orthopaedic Surgery Physician1396731014

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.