Dr. Marianne S Rosen, MD practises Dermatology in Glenview, Illinois. Graduated from Northwestern University Feinberg Medical School in 1999, 27 years ago. Practices with Forefront Dermatology SC, a 645-clinician group, works from 5 locations and accepts Medicare assignment. Licensed in Illinois.
From the CMS Doctors & Clinicians file — this clinician is
enrolled in Medicare.
Medicare specialty
DERMATOLOGY
Medical school
NORTHWESTERN UNIVERSITY FEINBERG MEDICAL SCHOOL
Graduated
1999 (27 years in practice)
Group practice
Forefront Dermatology Sc — 645 clinicians
Accepts Medicare assignment
Yes — accepts the Medicare-approved amount
Procedures
From CMS Care Compare, which counts the procedures a clinician billed to
Original Medicare and Medicare Advantage over a recent 12-month period.
CMS reports a fixed list of common procedures, so this is not everything
the clinician does. Counts of 10 or fewer are given as a range, because
CMS withholds small numbers.
Removal of skin lesions
1,608 times · 97th percentile
Skin biopsy
346 times · 92nd percentile
Melanoma (skin cancer) excision
37 times · 83rd percentile
Removal or shaving of skin growth
16 times · 69th percentile
The percentile compares how often this clinician performed the procedure
with other clinicians who performed it, as CMS calculates it. It measures
volume, not outcomes or skill.
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 patients
693
Services billed
5,064
a service is one billed item, such as a visit, a test or a procedure
Average patient age
75
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.
Payments from drug and device companies, 2025
Drug and device makers are required by federal law (the Physician Payments
Sunshine Act) to report what they pay or give to clinicians, and CMS
publishes the reports as Open Payments. This is the 2025 program
year. A report is a record of a payment, not an allegation of anything,
and many are small items such as meals. Only general payments are listed
here; research payments and ownership or investment interests are
reported separately by CMS and are not shown.
Food and Beverage
$1,803 106 payments · a meal or drink at a meeting or visit, not a fee
Each amount is the sum of what companies reported for that kind of
payment in 2025, rounded to the dollar. Not all of it is income to
the clinician: a meal is not a fee, a charitable contribution goes to a
charity, and a royalty or an acquisition payment is not a salary.
Check a report, or dispute one, at the source in CMS’s own tool,
Open Payments.
Corrections go through CMS’s dispute process. This site removes a
home address on request and asks for no proof, because that is privacy;
it will not remove an accurate payment report on request, because that is
a statutory public disclosure.
Colleagues at Forefront Dermatology SC
Clinicians the CMS Doctors & Clinicians file lists under the same group practice.
CMS counts 645 clinicians in the practice; 12 are shown here.