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.
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
- Jennifer O'Neil, NPNurse Practitioner1689411548
- John O'Neill, O.D.Optometrist1356503403
- Jennifer Oetgen, PHARMDPharmacist1245572833
- Makiko Ogino-McElligott, PA-CPhysician Assistant1134121965
- Daniel OkonSocial Worker1548649205
- Joan Olson, MS, OTR/LOccupational Therapist1275880262
- Nancy Olson, MA, NCC, LCPCCounselor1942501887
- Stephanie OlsonOccupational Therapist1972757425
- Abiodun OludaisiMassage Therapist1811604150
- Afsheen Ommar, D.D.S.Dentist1831530443
- Candace Opon, D.D.S.General Practice Dentistry1053603365
- Kyle Opperman-HillMental Health Counselor1306621255
- Emily Ornelas, DCChiropractor1457670259
- Luna OrtegaBehavior Technician1487501912
- Patricia OrtegaBehavior Technician1518896323
- Sarah Orth, PSY.D.Clinical Psychologist1811038862
- Adriana OrtizSocial Worker1609686971
- Richard Osmanski, D.D.S.General Practice Dentistry1629243076
- Adam Ostergaard, DPTPhysical Therapist1992471148
- Alyssa Ostrowski, CCC-SLPSpeech-Language Pathologist1427790229
- Brian Overmyer, DDSDentist1174961841
- Miriam Owens Gutierre, LCPCAddiction (Substance Use Disorder) Counselor1871618801
- Adam Ozment, D.D.S.Oral and Maxillofacial Surgery (Dentist)1033127238
- Eric PaceSpeech-Language Pathologist1841566957
- Greg PadjenPharmacist1104100213
- Dama Paje, CRNACertified Registered Nurse Anesthetist1932176658
- Lauren PalsgroveStudent in an Organized Health Care Education/Training Program1689115156
- Whitney Pando, MHSSpeech-Language Pathologist1497986087
- Sara Panke, LCSWClinical Social Worker1013579085
- Ubaidur Papa, M.D.Pediatrics Physician1043237696
- Sherri PaprockiNurse Practitioner1538790266
- Charlotte Parcels, LCSWClinical Social Worker1356488415
- Dhruvi Parikh, DMDGeneral Practice Dentistry1144993833
- Mahesh Parikh, M.D.Neurology Physician1659309151
- Kelly PariseCounselor1215493176
- Elisa ParkPharmacist1124623863
- Amber ParkerBehavior Analyst1982230785
- Kimberly Parks, LPCProfessional Counselor1972088466
- Mackenzie Parry, RBT-17-31537Behavior Technician1346739380
- Donalda PashoPharmacist1568065688
- Taylor PasqualeSocial Worker1295336634
- Sayra PasquesiPhysician Assistant1952824534
- Gita Patel, RPHPharmacist1447854666
- Heeren Patel, M.D.Neurology Physician1982865481
- Kavi Patel, M.D.Hematology & Oncology Physician1427589563
- Nimisha PatelPharmacist1609157387
- Niral Patel, M.D.Family Medicine Physician1083845945
- Palak PatelDentist1841817699
- Payal Patel, O.D.Optometrist1013158674
- Preya Patel, FNPNurse Practitioner1124834163
The largest Illinois cities
- Chicago63,379
- Springfield4,997
- Naperville4,634
- Peoria4,621
- Evanston4,013
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.