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 27 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. Sharon Swan, L.P.N.Licensed Practical Nurse1225226269
  2. Alex Swanson, DCChiropractor1316411077
  3. Susan Swanson, DNPFamily Nurse Practitioner1225088636
  4. Lyubomyra SydorSchool Counselor1699562652
  5. Carrie Sypherd, O.D.Optometrist1992756290
  6. Paulina Szczerba, PHARMDPharmacist1720368210
  7. Karen Szumanski, OTOccupational Therapist1285991331
  8. Elizabeth Tabacsko, MOT, OTR/LPediatric Occupational Therapist1669551529
  9. Jesse Taber, MDNeurology Physician1932268570
  10. Tisha Joerla Tan, M.D.Nephrology Physician1881959872
  11. Sheila Tanner Egan, LCSWClinical Social Worker1164907333
  12. Julia Tansor, PT, DPTPhysical Therapist1962935213
  13. Allison Teliszczak, CNPFamily Nurse Practitioner1679941819
  14. Kristine TenhagenBehavior Technician1497698922
  15. John Terlep, D.C.Chiropractor1881917623
  16. Michael ThielProfessional Counselor1154782068
  17. Carissa Thiele, MS, CCC-SLPSpeech-Language Pathologist1720425465
  18. Misty Thillen, D.D.S.General Practice Dentistry1689751489
  19. Lori Thomas, LCSW, CADC, MISAClinical Social Worker1669865176
  20. Merrin Thomas, DPTPhysical Therapist1811476542
  21. John ThometzFoot & Ankle Surgery Podiatrist1386165389
  22. Kaitlin Thompson, MS, CCC-SLP, CLCSpeech-Language Pathologist1467951905
  23. Justina ThurmondBehavior Analyst1760043988
  24. Krishna Tikiwala, DPMFoot & Ankle Surgery Podiatrist1457916785
  25. George Toliopoulos, RPHPharmacist1548387467
  26. Kelsy Tomlin, PT, DPTPhysical Therapist1609644111
  27. Manette TomlinsonProfessional Counselor1558848390
  28. Ariadna Torres-Gorena, DDS, MSDOrthodontics and Dentofacial Orthopedics Dentistry1548669815
  29. Dana Towler, M.S., CCC-SLPSpeech-Language Pathologist1285756775
  30. Margo Towne, M.S.,CCC-SLPSpeech-Language Pathologist1063668754
  31. Carol Trejo Kroeger, LCPCMental Health Counselor1962823542
  32. Jessica Troxell, OTR/LOccupational Therapist1972702249
  33. Nicole TrujilloProfessional Counselor1427566116
  34. Ashley TuckerProfessional Counselor1134828684
  35. Teresa Turchan, PTPhysical Therapist1427315688
  36. Austin Tweet, DDSGeneral Practice Dentistry1558091819
  37. Alexander Tzanos, D.D.S.Periodontics1821250630
  38. Tanya Udchik, RPHPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1972884922
  39. Catherine UnruhOccupational Therapist1447602891
  40. Erin UpadhayayBehavior Technician1689564197
  41. Faith Urbanik, OTD, OTR/LOccupational Therapist1083320287
  42. Stephanie Vackicev, MA CCC-SLPSpeech-Language Pathologist1497428973
  43. Joy Valko, PSYDClinical Psychologist1174846141
  44. Lauren Van ValkenburghPhysical Therapist1407589526
  45. Valerie Vandello, PTPhysical Therapist1376878694
  46. Sarah Vanmoffaert, LPCProfessional Counselor1720501836
  47. Amy Vanroekel, MSWDevelopmental Therapist1134401938
  48. Rosalyn VasquezDentist1114584836
  49. Chandragupta Vedak, MDPsychiatry Physician1871592881
  50. Jorge VelazquezBehavior Analyst1073085767

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.