Internal Medicine Providers in Peru, IL
Browse 5 Internal Medicine providers listed in NPPES with a practice address in Peru, Illinois.
How Peru compares with the U.S.
5 active clinicians in Internal Medicine list a practice address in Peru, IL in the NPI registry.
Peru has fewer than 10,000 residents, so rates per 100,000 people change a lot with each clinician and are not compared here.
Too few clinicians in Internal Medicine in Peru 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 Registry addresses can be out of date.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. Mark Allen Fernandez , MD
Internal Medicine
Dr. Joel S Leifheit , MD
Internal Medicine
Dr. Mustafa A Sayeed , DO
Internal Medicine
Dr. Won Yang Kim , MD
Internal Medicine
Dr. Constantino Perales , MD
Internal Medicine
Frequently Asked Questions about Internal Medicine in Peru
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 Peru
Internal Medicine Providers in Other Illinois Cities
Cities with the most listed practitioners first.