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

Dr. Marc Posner, MD

Individual provider Radiation Oncology Physician · NPI 1871569574

Dr. Marc Posner, MD is a Radiation Oncology in Lake Forest, Illinois. Graduated from Harvard Medical School in 1995, 31 years ago. Practices with Northwestern Medical Faculty Foundation, a 4,394-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Illinois.

Years since qualifying
31
Trained at
Harvard Medical School
Licensed in
IL
In the registry since
2006
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

660 N Westmoreland Rd
Lake Forest, IL 60045-1659
Phone: (847) 535-6135
Fax: (847) 535-7858
Show map & directions

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

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence 036102182 (IL)

Record details

NPI number1871569574
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 23, 2006
Last updated in NPPESSeptember 2, 2014
Mailing address660 N Westmoreland Rd, Lake Forest, IL 60045-1659

Medicare enrollment

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

Medicare specialtyRADIATION ONCOLOGY
Medical schoolHARVARD MEDICAL SCHOOL
Graduated 1995 (31 years in practice)
Group practice Northwestern Medical Faculty Foundation — 4394 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations14 on file with Medicare

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