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 20 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. Jennifer O'Neil, NPNurse Practitioner1689411548
  2. John O'Neill, O.D.Optometrist1356503403
  3. Jennifer Oetgen, PHARMDPharmacist1245572833
  4. Makiko Ogino-McElligott, PA-CPhysician Assistant1134121965
  5. Daniel OkonSocial Worker1548649205
  6. Joan Olson, MS, OTR/LOccupational Therapist1275880262
  7. Nancy Olson, MA, NCC, LCPCCounselor1942501887
  8. Stephanie OlsonOccupational Therapist1972757425
  9. Abiodun OludaisiMassage Therapist1811604150
  10. Afsheen Ommar, D.D.S.Dentist1831530443
  11. Candace Opon, D.D.S.General Practice Dentistry1053603365
  12. Kyle Opperman-HillMental Health Counselor1306621255
  13. Emily Ornelas, DCChiropractor1457670259
  14. Luna OrtegaBehavior Technician1487501912
  15. Patricia OrtegaBehavior Technician1518896323
  16. Sarah Orth, PSY.D.Clinical Psychologist1811038862
  17. Adriana OrtizSocial Worker1609686971
  18. Richard Osmanski, D.D.S.General Practice Dentistry1629243076
  19. Adam Ostergaard, DPTPhysical Therapist1992471148
  20. Alyssa Ostrowski, CCC-SLPSpeech-Language Pathologist1427790229
  21. Brian Overmyer, DDSDentist1174961841
  22. Miriam Owens Gutierre, LCPCAddiction (Substance Use Disorder) Counselor1871618801
  23. Adam Ozment, D.D.S.Oral and Maxillofacial Surgery (Dentist)1033127238
  24. Eric PaceSpeech-Language Pathologist1841566957
  25. Greg PadjenPharmacist1104100213
  26. Dama Paje, CRNACertified Registered Nurse Anesthetist1932176658
  27. Lauren PalsgroveStudent in an Organized Health Care Education/Training Program1689115156
  28. Whitney Pando, MHSSpeech-Language Pathologist1497986087
  29. Sara Panke, LCSWClinical Social Worker1013579085
  30. Ubaidur Papa, M.D.Pediatrics Physician1043237696
  31. Sherri PaprockiNurse Practitioner1538790266
  32. Charlotte Parcels, LCSWClinical Social Worker1356488415
  33. Dhruvi Parikh, DMDGeneral Practice Dentistry1144993833
  34. Mahesh Parikh, M.D.Neurology Physician1659309151
  35. Kelly PariseCounselor1215493176
  36. Elisa ParkPharmacist1124623863
  37. Amber ParkerBehavior Analyst1982230785
  38. Kimberly Parks, LPCProfessional Counselor1972088466
  39. Mackenzie Parry, RBT-17-31537Behavior Technician1346739380
  40. Donalda PashoPharmacist1568065688
  41. Taylor PasqualeSocial Worker1295336634
  42. Sayra PasquesiPhysician Assistant1952824534
  43. Gita Patel, RPHPharmacist1447854666
  44. Heeren Patel, M.D.Neurology Physician1982865481
  45. Kavi Patel, M.D.Hematology & Oncology Physician1427589563
  46. Nimisha PatelPharmacist1609157387
  47. Niral Patel, M.D.Family Medicine Physician1083845945
  48. Palak PatelDentist1841817699
  49. Payal Patel, O.D.Optometrist1013158674
  50. Preya Patel, FNPNurse Practitioner1124834163

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.