Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Robert Knudson, MD

Individual provider Diagnostic Radiology Physician · NPI 1235170069

Robert Knudson, MD practises Diagnostic Radiology in Springfield, Illinois. Graduated from University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb) in 1998, 28 years ago. Practices with Springfield Clinic, LLP, a 679-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
28
Trained at
University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb)
Licensed in
IL
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1025 S 6th St
Springfield, IL 62703-2499
Phone: (217) 528-7541
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence 036109217 (IL)

Record details

NPI number1235170069
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 10, 2006
Last updated in NPPESAugust 22, 2022
Certification dateAugust 22, 2022

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolUNIVERSITY OF ILLINOIS COLLEGE OF MED (CHI/PEOR/ROCK/CHM-URB)
Graduated 1998 (28 years in practice)
Group practice Springfield Clinic, Llp — 679 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations16 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients1,662
Services billed 3,928 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Springfield Clinic, LLP

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 679 clinicians in the practice; 12 are shown here.

Other providers in Springfield