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

Dr. Diane Flershem, MD

Individual provider Internal Medicine Physician · NPI 1447205869

Dr. Diane Flershem, MD is an Internal Medicine in Arlington Heights, Illinois. Graduated from Rush Medical College of Rush University in 1994, 32 years ago. Practices with Riverside Medical S C, a 9-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Illinois.

Years since qualifying
32
Trained at
Rush Medical College of Rush University
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

3405 N Arlington Heights Rd
Arlington Heights, IL 60004-1536
Phone: (847) 577-9300
Fax: (847) 577-9318
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 036095157 (IL)

Record details

NPI number1447205869
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 24, 2006
Last updated in NPPESFebruary 25, 2011

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolRUSH MEDICAL COLLEGE OF RUSH UNIVERSITY
Graduated 1994 (32 years in practice)
Group practice Riverside Medical S C — 9 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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