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 65 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. Elizabeth Pector, MDFamily Medicine Physician1841239787
  2. Jessica Peczeniuk, MS, BCBA, LBABehavior Analyst1851891154
  3. Alise Pedersen, MSW, LSWSocial Worker1528737731
  4. Mark Pedigo, LCSWClinical Social Worker1063504793
  5. Mark PedziwiatrHand Physical Therapist1669943700
  6. John Peggau, PYSDContractor1003020082
  7. Lisa Peirce Boyle, M.ED., BCBABehavior Analyst1972808905
  8. Renee Peksa-Sink, D.O.Emergency Medicine Physician1043535917
  9. Gabrielle Pelham, LPC ATR-PCounselor1871119552
  10. Dalip Pelinkovic, M.D.Orthopaedic Surgery Physician1043436819
  11. Mark Pelka, M.D.Interventional Cardiology Physician1114389418
  12. Lisa Pellegrini, M.D.Neurology Physician1801849161
  13. Roberto Pena, LCSW, CADCClinical Social Worker1316043722
  14. Renata Pendle, BCBA, LBABehavior Analyst1730684556
  15. Kun Peng, MDPain Medicine (Anesthesiology) Physician1790985349
  16. Laura Pepper, LSW CADCClinical Social Worker1043388853
  17. James Pera, MDPediatrics Physician1851335053
  18. Annemarie Perez, M.S.Speech-Language Pathologist1427464858
  19. Arianna PerezBehavior Analyst1912732025
  20. Esmeralda PerezRegistered Nurse1437099074
  21. Luis PerezStudent in an Organized Health Care Education/Training Program1699213801
  22. Sandra Perez Avila, LSWClinical Social Worker1568359057
  23. Andres Perez DelgadilloBehavior Technician1285550970
  24. Marykate Perisin, PT, DPTPhysical Therapist1699628495
  25. Angela PerkinsRehabilitation Counselor1295923407
  26. Blake Perkins, M.D.Anesthesiology Physician1760827273
  27. Suzanne Peroutka, M.S., LCPC, ATR-BCMental Health Counselor1083683791
  28. Jennifer PerruquetSpeech-Language Pathologist1083272926
  29. Bradley Perry, DPTPhysical Therapist1538201389
  30. Michelle PerryProfessional Counselor1427390152
  31. Sue Perry, LMFTMarriage & Family Therapist1811067416
  32. Pamela PersakPediatrics Physician1437133766
  33. Nadia Persun, LCPCProfessional Counselor1871797613
  34. Sindhu Perumal, M.D.Family Medicine Physician1740494236
  35. Hassan Pervez, M.D.Hematology & Oncology Physician1144373457
  36. Aaron PeskaClinical Social Worker1194240127
  37. Michael Peske, D.D.S.Pediatric Dentistry1629109293
  38. Michael Peters, MDFamily Medicine Physician1023005097
  39. Anna Petersen, MS RD LDNRegistered Dietitian1568128346
  40. Cheryl Petersen, LCSWClinical Social Worker1033224860
  41. Joseph PetersenMental Health Counselor1831929256
  42. Michele Petersmark, LCPCProfessional Counselor1427103498
  43. Anthony Peterson, MDDermatology Physician1144424649
  44. Daniel Peterson, LCPCProfessional Counselor1750539508
  45. Julie Peterson, LCSWClinical Social Worker1619516960
  46. Melissa Peterson, DPTPhysical Therapist1073046652
  47. Peter Petratos, MDSurgery Physician1487612297
  48. Geralyn Petrauskas, SLPSpeech-Language Pathologist1427265909
  49. Joseph Petrauskas, DDSDentist1457435380
  50. Jasmina PetrevaBehavior Technician1811685456

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.