Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Robert R McWilliams, MD

Individual provider Internal Medicine Physician · NPI 1487633962

Robert R McWilliams, MD is a Medical Oncology in Peoria, Illinois. Graduated from George Washington University School of Medicine in 1997, 29 years ago. Practices with Mayo Clinic, a 4,796-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Illinois and Minnesota.

Years since qualifying
29
Trained at
George Washington University School of Medicine
Licensed in
IL, MN
In the registry since
2006
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

530 NE Glen Oak Ave
Peoria, IL 61637-0001
Phone: (309) 655-2000
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 200 1st St Sw, Rochester, MN 55905-0001 — (507) 284-2511

Specialties & licences

Medical Oncology Physician (primary) Taxonomy 207RX0202X · Licence 036131628 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 036131628 (IL)
Hematology & Oncology Physician Taxonomy 207RH0003X · Licence 44014 (MN)
Medical Oncology Physician Taxonomy 207RX0202X · Licence 44014 (MN)

Record details

NPI number1487633962
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJanuary 12, 2006
Last updated in NPPESFebruary 25, 2026
Certification dateFebruary 25, 2026
Mailing address30791 High Rd, Fountain, MN 55935-5147

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyMEDICAL ONCOLOGY
Also practisesHEMATOLOGY/ONCOLOGY
Medical schoolGEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1997 (29 years in practice)
Group practice Mayo Clinic — 4796 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

Other providers in Peoria