NPPES file of Aug 9, 2026

Doctors and health care providers in Chester, IL

66 individual NPPES records list a practice address in Chester, 313th of 541 Illinois cities. The largest group is family medicine physician: 10, 15% of the city's records, against 3% across Illinois. Page 2 of 2.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

Chester in Illinois

  • Rank in Illinois313th of 541 cities by records
  • Share of the state<0.1% of Illinois's records
  • Specialties present25 or more taxonomy codes
  • Top three groups30.3% of all records

Compared with Illinois as a whole, Chester has 5.8× the state's share of family medicine physician records.

Providers in Chester, alphabetically

  1. Jason Roy, PTPhysical Therapist1144402462
  2. Marie-Ange Sainvilus, MDObstetrics & Gynecology Physician1083602072
  3. Cheryl SauerhagePhysical Therapist1134619950
  4. Samantha SchmerbauchDevelopmental Therapist1275940538
  5. Kacey SearchSpeech-Language Pathologist1740836998
  6. Lawrence Soellner, ODOptometrist1073595005
  7. Melissa Soellner, RDRegistered Dietitian1881726297
  8. Megan Stewart, OTR/LOccupational Therapist1326615014
  9. Prithviraj Thakur, MDPsychiatry Physician1801884226
  10. Percival Tiongson, M.D.Psychiatry Physician1871772913
  11. Jena TresslerPhysical Therapy Assistant1174195358
  12. Nageswararao Vallabhaneni, MD PSYCHIATRISTPsychiatry Physician1215925656
  13. Kathleen Winkler, RPHPharmacist1275240103
  14. Andrea Winterberg, RPHPharmacist1508625260
  15. Doyle Witt, M.D.Family Medicine Physician1649613134
  16. Dorothy Zajac, MDInternal Medicine Physician1972592210

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

Chester, Illinois appears in the CMS National Plan and Provider Enumeration System with 66 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 Chester - 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 Chester 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 Chester is weighted toward Family Medicine Physician (10 clinicians, followed by Pharmacist with 6 and Physical Therapy Assistant with 4). 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, Chester reports roughly 0.5 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, Mental Health Counselor is the most prominent one with no provider currently listing a Chester practice address, a coverage gap Chester patients typically fill by traveling to a larger nearby hub.

For Chester 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 Chester, IL?

There are 66 registered healthcare providers in Chester, IL, covering 25 or more specialties. This includes physicians, dentists, therapists, and other licensed providers.

What are the most common medical specialties in Chester?

The most common specialties in Chester are Family Medicine Physician, Pharmacist, Physical Therapy Assistant, Physical Therapist, Psychiatry Physician. Family Medicine Physician has the most providers with 10.

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.