Internal Medicine Providers in St Charles, IL
Browse 8 Internal Medicine providers listed in NPPES with a practice address in St Charles, Illinois.
How St Charles compares with the U.S.
8 active clinicians in Internal Medicine list a practice address in St Charles, IL in the NPI registry.
With fewer than 10 clinicians, rates per 100,000 residents are not reliable enough to compare.
Too few clinicians in Internal Medicine in St Charles are listed in the CMS Medicare file to report Medicare assignment or telehealth shares.
These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.
Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com · Methodology
Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026.
Dr. Zbigniew M Ciechanowski , MD
Internal Medicine
Dr. Marissa C Jama , DO
Internal Medicine
Dr. Scott Duncan Mcnaughton , MD
Internal Medicine
Dr. Laura Koeppel Tagle , MD
Internal Medicine
Dr. Catherine Sabu Thomas , MD
Internal Medicine
Dr. Vivian S Vanroekel , MD
Internal Medicine
Dr. Lawrence H. Yoo , MD
Internal Medicine
Dr. Lori A Zimmers , MD
Internal Medicine
Frequently Asked Questions about Internal Medicine in St Charles
Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the Illinois licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.
This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.
Other Specialties in St Charles
Internal Medicine Providers in Other Illinois Cities
Cities with the most listed practitioners first.