NPPES file of Aug 9, 2026

Doctors and health care providers in St Charles, IL

1,113 individual NPPES records list a practice address in St Charles, 40th of 541 Illinois cities. The largest group is behavior technician: 117, 11% of the city's records, against 4% across Illinois. Page 8 of 23.

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

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

The 8 largest groups in St Charles

  1. Behavior Technician117
  2. Clinical Social Worker93
  3. Speech-Language Pathologist84
  4. Professional Counselor74
  5. Chiropractor55
  6. Physical Therapist49
  7. Mental Health Counselor44
  8. Pharmacist38

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

St Charles in Illinois

  • Rank in Illinois40th of 541 cities by records
  • Share of the state0.5% of Illinois's records
  • Specialties present25 or more taxonomy codes
  • Top three groups26.4% of all records

Compared with Illinois as a whole, St Charles has 4.1× the state's share of pediatric occupational therapist records and 0.42× its share of family nurse practitioner records.

Providers in St Charles, alphabetically

  1. Jonathon Gruszeczki, LCPCMental Health Counselor1710305685
  2. Tara Grzetic, DMD, MSOrthodontics and Dentofacial Orthopedics Dentistry1467060897
  3. Ana Grzybek, MHS, CCC-SLP/LSpeech-Language Pathologist1972146702
  4. Elaine Gudeman, RNHome Health Registered Nurse1225289465
  5. Michael Guidotti, M.S., CCC-SLP/LSpeech-Language Pathologist1629550959
  6. Wyatt Gundlach, RBTBehavior Technician1932059748
  7. Nicole Gutierrez, RBTBehavior Technician1588471692
  8. Fatima Hadi, MDChild & Adolescent Psychiatry Physician1437222791
  9. Alexandria Halkias, O.D.Optometrist1336208016
  10. Cynthia Halleran, PTPhysical Therapist1659390243
  11. Mitchell Halper, MDPsychiatry Physician1205039658
  12. Nayyara Hameeduddin, MDPediatrics Physician1912187055
  13. Karen Hammond, LCSWClinical Social Worker1275032336
  14. Constance HansenSocial Worker1497422992
  15. Michelle Hansen, PSYDClinical Psychologist1316683634
  16. Jennifer Hanson, MS EDProfessional Counselor1992947162
  17. Judith Hanson, LCSWClinical Social Worker1891982740
  18. Susan Hanson, LCPCProfessional Counselor1922252568
  19. Luz Happel, LCSWClinical Social Worker1013320365
  20. Heather Harej, PSY.D.Clinical Psychologist1689788739
  21. Kim Harmon, M.D.Obstetrics & Gynecology Physician1932188299
  22. Ronald Harmon, M.D.Pain Medicine (Anesthesiology) Physician1639271273
  23. Anna HarmsBehavior Analyst1164229217
  24. Withman Haro, M.D.Pediatrics Physician1194937169
  25. Margaret HarperSpeech-Language Pathologist1942145909
  26. Charles Harrier, MSED ATCAthletic Trainer1932541778
  27. James HarrisInterpreter1164761987
  28. Samantha HarrisAddiction (Substance Use Disorder) Counselor1659118453
  29. Ryan Hart, RBTBehavior Technician1750121653
  30. Lauren Hartford, LCPC ALMFTMental Health Counselor1912669144
  31. Patrick Hartney, LPCProfessional Counselor1881518405
  32. Christy Harvey, MDOphthalmology Physician1417390584
  33. Dana Hauk, PSYDClinical Psychologist1083426472
  34. Cynthia HayesSpeech-Language Pathologist1942340450
  35. Molly Hayes, DDSDentist1710328885
  36. Kyle Hayles, RBTBehavior Technician1992556708
  37. Warren Heard, PH.D.Marriage & Family Therapist1396887949
  38. Brian Heffelfinger, M.D.Ophthalmology Physician1396804290
  39. Patricia Heffern, MSW, CADCAddiction (Substance Use Disorder) Counselor1073785267
  40. Alan Hefner, M.D.Ophthalmology Physician1962561282
  41. Ariana Heiger, DOFamily Medicine Physician1821662073
  42. Thomas HelminskiPharmacist1508215187
  43. David Hemmer, M.D.Specialist1710984729
  44. Heather Henderson, APRN, CNPNurse Practitioner1306864806
  45. Ashley Hendrickson, HEALTH COACHHealth & Wellness Coach1700700069
  46. Rona Henne, OTR/LOccupational Therapist1548788243
  47. Abigail Henry, LPCProfessional Counselor1518507383
  48. Maureen HenryDevelopmental Therapist1497180095
  49. Maureen Henry, LCSWClinical Social Worker1093117715
  50. Christina Hensel, MOT, OTR/LPediatric Occupational Therapist1871841528

The largest Illinois cities

  1. Chicago63,379
  2. Springfield4,997
  3. Naperville4,634
  4. Peoria4,621
  5. Evanston4,013

All of Illinois →

How to read this directory

St Charles, Illinois appears in the CMS National Plan and Provider Enumeration System with 1,113 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 St Charles - 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 St Charles 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 St Charles is weighted toward Behavior Technician (117 clinicians, followed by Clinical Social Worker with 93 and Speech-Language Pathologist with 84). 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, St Charles reports roughly 8.9 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, Internal Medicine Physician is the most prominent one with no provider currently listing a St Charles practice address, a coverage gap St Charles patients typically fill by traveling to a larger nearby hub.

For St Charles 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 St Charles, IL?

There are 1,113 registered healthcare providers in St Charles, IL, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in St Charles?

The most common specialties in St Charles are Behavior Technician, Clinical Social Worker, Speech-Language Pathologist, Professional Counselor, Chiropractor. Behavior Technician has the most providers with 117.

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.