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 16 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. Jake Laukert, PT, DPTPhysical Therapist1386440360
  2. Lawrence Lavine, M.D.Pain Medicine (Anesthesiology) Physician1336119171
  3. Jennifer Lawrence, C.N.P.Family Nurse Practitioner1073066437
  4. Julia Lawrence, LCPCProfessional Counselor1881011724
  5. Paiton LawrenceBehavior Technician1801770003
  6. Jeremy Lawson, DCChiropractor1619652286
  7. Christian Lazaro-Marshall, PHARMDPharmacist1215774575
  8. Madison LazenbyOccupational Therapy Assistant1699560557
  9. Michael Leavitt, DPTPhysical Therapist1255688800
  10. Julia Leblanc, MDGastroenterology Physician1467416990
  11. Nikki Lechel, RTCardiovascular-Interventional Technology Radiologic Technologist1043030679
  12. Jenna Lee, DPTPhysical Therapist1528610268
  13. Jerelyn LeeSocial Worker1699475723
  14. Jessica Lee, DPTPhysical Therapist1801562145
  15. John Lee, PHARMDPharmacist1538763107
  16. Soo Lee - Samuel, MDChild & Adolescent Psychiatry Physician1275683211
  17. Genevieve LeenanSpeech-Language Pathologist1649482829
  18. Gregory Lehman, DDSOral and Maxillofacial Surgery (Dentist)1477592061
  19. Malinda Lehman, MHP, LSWSocial Worker1154273852
  20. Michelle Lehn, FNP-BC, FPAFamily Nurse Practitioner1376183467
  21. Erin LeibSpeech-Language Pathologist1538992789
  22. Ronald Leib, DPMFoot & Ankle Surgery Podiatrist1548315021
  23. Annie Leinart, PA-CPhysician Assistant1467311274
  24. Sara Lemke, M.A., LPCMental Health Counselor1932427275
  25. Briahna LenihanBehavior Technician1629835368
  26. Nadine LepleySocial Worker1346697414
  27. Michael Lesser, MDFamily Medicine Physician1760593032
  28. Stephanie LethebyBehavior Technician1346907482
  29. Laura Leukaufe, LMTMassage Therapist1093194391
  30. Dawn Levitan, MS., ED.D., LCPCCognitive & Behavioral Psychologist1013091750
  31. John Lewandowski, PSYDPsychologist1104307917
  32. Yanbing Li, M.D.Family Medicine Physician1104843739
  33. Mary Liethen, M.S., CCC-SLP/LSpeech-Language Pathologist1609381672
  34. Jacki Liggett, APN, FNPFamily Nurse Practitioner1194102053
  35. Kathleen Ligon, LCSWClinical Social Worker1164434643
  36. Ryane LikarSocial Worker1316711039
  37. Donna Lilly, BTBehavior Technician1902676885
  38. Brendon Lin, MDPhysical Medicine & Rehabilitation Physician1326612730
  39. Rachel LindenSpeech-Language Pathologist1902223290
  40. Kylie LindquistBehavior Technician1013895895
  41. Sheri Lindsey, LSWSocial Worker1093423733
  42. Nelle Link, DPTPhysical Therapist1073127635
  43. Jerry Liu, M.D.Hematology & Oncology Physician1356551899
  44. Haley Lochan, LCSWCounselor1528672839
  45. Rebecca Lockwood, PH.D.Clinical Psychologist1295922482
  46. Lindsay Loehner, FNP-BCObstetrics & Gynecology Nurse Practitioner1336561646
  47. Tana Lombardo, APRNFamily Nurse Practitioner1184320988
  48. Megan Long, DPTPhysical Therapist1679614556
  49. Luigi Longo, PHARM.D.Pharmacist1760767917
  50. Jennifer Loose, D.C.Chiropractor1437283611

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.