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

Mr. Gerald Simon, MD

Individual provider Geriatric Medicine (Internal Medicine) Physician · NPI 1861450330

Mr. Gerald Simon, MD is an Internal Medicine in Countryside, Illinois. Graduated from Loyola University of Chicago, Stritch School of Medicine in 1982, 44 years ago. Practices with Nani Internal Med LLC, a 5-clinician group and works from 2 locations. Licensed in Illinois.

Years since qualifying
44
Trained at
Loyola University of Chicago, Stritch School of Medicine
Licensed in
IL
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

6438 Joliet Rd Ste 203
Countryside, IL 60525-4624
Phone: (708) 352-5222
Fax: (708) 352-1576
Show map & directions

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

Additional practice locations (1)

  • 412 63rd St, Downers Grove, IL 60516-2000 — (630) 719-5470

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 036066840 (IL)
Geriatric Medicine (Internal Medicine) Physician Taxonomy 207RG0300X · Licence 36066840 (IL)

Record details

NPI number1861450330
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 3, 2006
Last updated in NPPESFebruary 1, 2023
Certification dateFebruary 1, 2023
Mailing address120 W 22nd St Ste 200, Oak Brook, IL 60523-1563

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolLOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE
Graduated 1982 (44 years in practice)
Group practice Nani Internal Med Llc — 5 clinicians
Accepts Medicare assignment Not indicated