NPPES file of Aug 9, 2026

Doctors and health care providers in Crystal Lake, IL

1,442 individual NPPES records list a practice address in Crystal Lake, 28th of 541 Illinois cities. The largest group is behavior technician: 120, 8% of the city's records, against 4% across Illinois. Page 8 of 29.

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

The 8 largest groups in Crystal Lake

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

Crystal Lake in Illinois

  • Rank in Illinois28th of 541 cities by records
  • Share of the state0.6% of Illinois's records
  • Specialties present25 or more taxonomy codes
  • Top three groups21% of all records

Compared with Illinois as a whole, Crystal Lake has 2.5× the state's share of occupational therapy assistant records and 0.41× its share of internal medicine physician records.

Providers in Crystal Lake, alphabetically

  1. Debra Duggan, LMTMassage Therapist1063812840
  2. Koren Duhr, D.C.Sports Physician Chiropractor1164599775
  3. Eve DunnBehavior Technician1043156078
  4. Michelle DvorakOccupational Therapy Assistant1144646266
  5. Deana Dy, M.D.Allergy & Immunology Physician1518950781
  6. Erika Dycus, RN LDNNutritionist1467147140
  7. Filip DyminskiStudent in an Organized Health Care Education/Training Program1508244153
  8. Marilyn Dyre, PHDClinical Social Worker1386742633
  9. Barbara Easterday, MSW, LCSWMental Health Counselor1629085246
  10. Anthony Ebel, D.C.Chiropractor1851571780
  11. Monica Eckles, COTA/LOccupational Therapy Assistant1639367071
  12. Amy Eddy, LCSWClinical Social Worker1114780822
  13. Christa Edwards, MDObstetrics & Gynecology Physician1194286161
  14. Stephanie Egan, PT, DPT, LMTPhysical Therapist1174971832
  15. Gilbert Egekeze, MDInternal Medicine Physician1548361959
  16. Tracy Egge, OTR/LOccupational Therapist1336735844
  17. Rachel Ehlers, DDSDentist1245924810
  18. Colin ElliottBehavior Technician1982349122
  19. Erin Elliott, O.T.R.Occupational Therapist1700011012
  20. Daniel Eloyza, RBTBehavior Technician1497597439
  21. Amanda Enger, LCPCMental Health Counselor1215452388
  22. Jessica Enright, MSWSocial Worker1245609262
  23. David EnsorSocial Worker1346052834
  24. Catherine Enz, OTOccupational Therapist1427305416
  25. Susan Enz, MA,CCC-SLP/LSpeech-Language Pathologist1831449602
  26. Jennifer Eramia, PHARMDPharmacist1548541139
  27. Ashlynn ErdmannBehavior Analyst1568000495
  28. Angela Erickson, LSWSocial Worker1568113892
  29. Kristin Erisman, LPCProfessional Counselor1982050647
  30. Ellen Erlichman, LCSWSocial Worker1932288115
  31. Lindsay Esch, M.D.Internal Medicine Physician1407110034
  32. Jessica EscontriasBehavior Technician1497393326
  33. Candace Esposito, FNP-BCNurse Practitioner1114568367
  34. Megan EspositoBehavior Technician1548741804
  35. Daisy EstradaBehavior Technician1770462145
  36. Emily Evenson, OTR/LOccupational Therapist1205071560
  37. Sana Fayyaz, MDFamily Medicine Physician1053870915
  38. Katherine Fee, LPCProfessional Counselor1437430030
  39. Michael Feinberg, RPHPharmacist1164716346
  40. Kristin FellClinical Social Worker1770930497
  41. Dalilah FernandezBehavior Technician1740137272
  42. Paula Fick, OTR/LOccupational Therapist1104175447
  43. Monica Fiedler, P.T.Pediatric Physical Therapist1265443923
  44. Angela FieldhouseMental Health Counselor1235801168
  45. Jennifer Finch, FNP-CFamily Nurse Practitioner1275193062
  46. Jami Finch-DerroSpeech-Language Pathologist1689006108
  47. Kaitlan FinnSpeech-Language Pathologist1083864235
  48. Amy Finnerty, MS CCC-SLP-LSpeech-Language Pathologist1447559315
  49. Ian Fisher, MDDiagnostic Radiology Physician1902828197
  50. Michelle Fisher, LCSWClinical Social Worker1942459177

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

Crystal Lake, Illinois appears in the CMS National Plan and Provider Enumeration System with 1,442 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 Crystal Lake - 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 Crystal Lake 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 Crystal Lake is weighted toward Behavior Technician (120 clinicians, followed by Physical Therapist with 92 and Clinical Social Worker with 91). 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, Crystal Lake reports roughly 11.5 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 Crystal Lake practice address, a coverage gap Crystal Lake patients typically fill by traveling to a larger nearby hub.

For Crystal Lake 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 Crystal Lake, IL?

There are 1,442 registered healthcare providers in Crystal Lake, IL, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Crystal Lake?

The most common specialties in Crystal Lake are Behavior Technician, Physical Therapist, Clinical Social Worker, Professional Counselor, Speech-Language Pathologist. Behavior Technician has the most providers with 120.

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.