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 48 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. Lorna London, PH.D.Clinical Psychologist1023182524
  2. Erica Long, PSYDPsychologist1508786385
  3. Erika Long, MHS, CCC-SLP/LSpeech-Language Pathologist1326250515
  4. Francine Long, MDInternal Medicine Physician1063406924
  5. Jennifer Long, OTOccupational Therapist1194234385
  6. Nicole Long, BCBABehavior Analyst1356021810
  7. Julie Loos, PTPhysical Therapist1376249995
  8. April Lopez, M.A. CCC/SLP-LSpeech-Language Pathologist1760623706
  9. Joanne Lorenz, PH.D.Clinical Psychologist1497725394
  10. Nicole Lorenz, RDRegistered Dietitian1760182778
  11. Cheryl Lorenzin, NPFamily Nurse Practitioner1417226986
  12. Mariapaz Lorenzo, LCPCProfessional Counselor1336670843
  13. Sarah Loster, ATR, LPCMental Health Counselor1043067952
  14. Tina Lott, EDD, LCPC,CADC, ACSProfessional Counselor1972154540
  15. Jennifer Loughran, LCSWClinical Social Worker1588905129
  16. Patrick Louie, PHARMDPharmacist1033374590
  17. Tiffany Louie, PA-CPhysician Assistant1548009913
  18. Tyler Louviere, PA-CPhysician Assistant1720640030
  19. Holly Loux, MDPediatrics Physician1215991245
  20. Nicholas Love, DOFamily Medicine Physician1992016901
  21. Scott Love, MDFamily Medicine Physician1265409197
  22. Li Shien Low, M.D.Interventional Cardiology Physician1760643373
  23. Beth LoySpeech-Language Assistant1366808487
  24. Isabella LoyaSocial Worker1841008489
  25. Vaneza Lozada, RBTBehavior Technician1073276515
  26. Lea Lua, MDPediatric Critical Care Medicine Physician1538144282
  27. Leah Lubniewski, LCPCProfessional Counselor1639579550
  28. Liana LucaricObstetrics & Gynecology Physician1265566319
  29. Jeff Lucas, LCPCAddiction (Substance Use Disorder) Counselor1861543423
  30. Paige Lucas, DPTPhysical Therapist1144790536
  31. Sanjay Lucas, LSWMental Health Counselor1447988571
  32. Vanessa Luchok, SLPSpeech-Language Pathologist1457698482
  33. Lindy Luchowski, APN-CNPNurse Practitioner1033801089
  34. Dennis Ludwig, PHARM.D.Pharmacist1275957433
  35. Allison Luebke, LCSWClinical Social Worker1831074509
  36. Kate Lueders, PT, DPTPhysical Therapist1194244616
  37. Ellie LuehringAmbulatory Care Pharmacist1437643319
  38. Caitlin Luetger-Schlewitt, LPC, NCCProfessional Counselor1891462818
  39. Ulrich Luft, MDCardiovascular Disease Physician1831115229
  40. Samantha Lugo, LCPCMental Health Counselor1669187639
  41. Junica Carla LugodBehavior Technician1912408766
  42. Sandra Lukashevich, LCPCProfessional Counselor1962870600
  43. Katelyn Lukensmeyer, LCSWClinical Social Worker1376207167
  44. Eric Lukosus, D.C.Chiropractor1992774277
  45. Mira Lukyana, LSWSocial Worker1780508952
  46. Andrew LunardiniPharmacist1154694149
  47. Katharyn Lupo, M.D.Internal Medicine Physician1295979300
  48. Kathleen Lutgen, CCC-SPSpeech-Language Pathologist1942419205
  49. Abigail Lynch, M.S. CCC-SLPSpeech-Language Pathologist1477862373
  50. Christina Lyon, D.O.Family Medicine Physician1437545183

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.