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

Dr. Gregory R Olson, MD

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1326428103

Dr. Gregory R Olson, MD is registered under Infectious Disease in Palos Heights, Illinois. Graduated from University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb) in 2015, 11 years ago. Practices with Southwest Infectious Disease and Internal Medicine S C, an 11-clinician group and accepts Medicare assignment. Licensed in Illinois and Massachusetts.

Years since qualifying
11
Trained at
University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb)
Licensed in
IL, MA
In the registry since
2015
Specialties on file
2
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

Student / training record This NPI belongs to someone enrolled in a health care training programme. It carries no licence and no practice of its own, so no address or phone number is published for it.

Palos Heights, IL

No coordinates on file. Search this address in Google Maps

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence 036.146290 (IL)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X · Licence 264177 (MA)

Record details

NPI number1326428103
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 5, 2015
Last updated in NPPESDecember 23, 2021
Certification dateDecember 23, 2021

Medicare enrollment

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

Medicare specialtyINFECTIOUS DISEASE
Medical schoolUNIVERSITY OF ILLINOIS COLLEGE OF MED (CHI/PEOR/ROCK/CHM-URB)
Graduated 2015 (11 years in practice)
Group practice Southwest Infectious Disease And Internal Medicine S C — 11 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients367
Services billed 1,795 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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 Southwest Infectious Disease and Internal Medicine S C

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 11 clinicians in the practice; 9 are shown here.

Other providers in Palos Heights