Clinicians affiliated with Illinois Gastroenterology Group LLC

115 clinicians on file with this group · most practice in Chicago-Naperville-Elgin, IL-IN · PAC ID 5193857423

Affiliation snapshotOctober 2, 2026CMS Doctors and Clinicians file, current snapshot (no end-of-2024 archive), applied to 2024
Activity year2024Medicare Part B claims, Original Medicare fee-for-service

110 clinicians affiliated with Illinois Gastroenterology Group LLC are in the 2024 Medicare Part B data, 62 of them physicians. Data years with affiliated clinicians: 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024.

Each clinician's exact figures are in their Physician Report, from their page; a specialty's figures in this market are in a Market Comparison. View sample report · Already purchased? Open your report

Affiliated clinicians by specialty, 2024

All specialties · Gastroenterology (51) · Certified Registered Nurse Anesthetist (CRNA) (37) · Nurse Practitioner (9) · Anesthesiology (4) · Internal Medicine (4) · Pathology (3) · Physician Assistant (2)

Specialty links go to the specialty in Chicago-Naperville-Elgin, IL-IN.

Clinicians affiliated with Illinois Gastroenterology Group LLC, 2024

Alphabetical by last name; 101–110 of 110.

NameSpecialtyCity
Priti Singh, MDAnesthesiologyElgin, IL
Lauren Smith, FNPNurse PractitionerOak Lawn, IL
Jennifer A Spanier-Stiasny, DOGastroenterologyGurnee, IL
Amy J Stites, PA-CPhysician AssistantBloomington, IL
Patricia K Sun, M.D.GastroenterologyArlington Heights, IL
Wei M Sun, M.D.GastroenterologyElgin, IL
Michelle L Switzer, CRNACertified Registered Nurse Anesthetist (CRNA)Springfield, IL
Natalie P Tarantur, APN-CRNACertified Registered Nurse Anesthetist (CRNA)Evanston, IL
Jeff T Victor, D.O.GastroenterologySt Charles, IL
Matthew Weiss, MDInternal MedicineHinsdale, IL

Practice locations

Listed practice locations in Illinois.

Source: CMS Doctors and Clinicians National Downloadable File, snapshot October 2, 2026.

Membership comes from the CMS Doctors and Clinicians file. CMS does not publish an end-of-year archive of it, so the current snapshot is applied to every data year. A clinician affiliated with several groups or hospitals appears on each of their pages. How group pages are built · Limitations