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 26 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. Jillian SouzaSocial Worker1205283363
  2. Laura Sovsky, MS CCC-SLPSpeech-Language Pathologist1497802250
  3. Gabriella SpagnolaSocial Worker1144181124
  4. Janice Spangler, PSYDClinical Psychologist1760552731
  5. Michelle Sparrow, FNP-CFamily Nurse Practitioner1184025140
  6. Lisa Spoden, COTA/LOccupational Therapy Assistant1417111832
  7. Tanner SpodenAthletic Trainer1326586538
  8. Lamont Sprague, O.D.Corneal and Contact Management Optometrist1215009832
  9. Darlene Springer, L.C.P.C.Professional Counselor1275662199
  10. Cari SprottBehavior Technician1720627573
  11. Katelyn St Martin, PA-CPhysician Assistant1144703992
  12. Laura Stalker, PTPhysical Therapist1144692211
  13. Jean Standefer-Schmoldt, PTPhysical Therapist1912264235
  14. Ryan StandiferOccupational Therapist1790021806
  15. Alyssa Stanek, LMTMassage Therapist1619363272
  16. Nicole StaplesSchool Social Worker1942920624
  17. Hailey StarrBehavior Technician1104765064
  18. Lynn StasenkaAttendant Care Provider1972158558
  19. Rimvydas Statkus, DPMFoot & Ankle Surgery Podiatrist1538510656
  20. Allison Steffens, DPTPediatric Physical Therapist1831565803
  21. Kayla SteinbergOther Specialist/Technologist1750091385
  22. Ashley Stensland, OTR/LNeurorehabilitation Occupational Therapist1407422165
  23. Grace Sterchi, LSWSocial Worker1124902440
  24. David Stern, D.D.S.General Practice Dentistry1144265182
  25. Jason Sterwerf, LCPCProfessional Counselor1467854059
  26. Nataliia Steshenko, PHYSICIAN EXTENDERSurgical Assistant1386296887
  27. Kristen Stewart, PHARMDPharmacist1417230350
  28. Regina Stilling, CNPFamily Nurse Practitioner1760743470
  29. William Stinson, MDInternal Medicine Physician1336112911
  30. Sarah Stitt, LCPCProfessional Counselor1386417103
  31. Carly Stohr, PTAPhysical Therapy Assistant1033466610
  32. Hanna StovallOccupational Therapist1366324527
  33. Tiffani StrasburgPhysical Therapy Assistant1467734475
  34. Daniel Strelcheck, DCChiropractor1922005560
  35. Eric StriekerAddiction (Substance Use Disorder) Counselor1427993260
  36. June Stroner, MA, LCPCProfessional Counselor1871733774
  37. Laura Strong, PSYDClinical Psychologist1740678754
  38. Kellie Stryker, LCSWClinical Social Worker1588142012
  39. Cheryl Sturtevant, PTAPhysical Therapy Assistant1508379942
  40. Longcheng Su, MDAnesthesiology Physician1235167834
  41. Ann SullivanBehavior Technician1659196913
  42. Karen SullivanProfessional Counselor1073938734
  43. Rebecca Sullivan, NPFamily Nurse Practitioner1689264061
  44. Timothy Sullivan, D.D.S.Dentist1396819215
  45. Ann Sumpter, L.C.S.W.Clinical Social Worker1063578557
  46. Xuefan Sun, PHARMDPharmacist1952696593
  47. Sean Mark Superticioso, PTPhysical Therapist1497217350
  48. Nicolette Surico, LCPCProfessional Counselor1093388688
  49. Richard Surowiak, O.D.Optometrist1811040983
  50. Hunter SusskyPhysical Therapist1164837662

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.