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

Dr. Marcia Tonnesen, MD

Individual provider Dermatology Physician · NPI 1205883238

Dr. Marcia Tonnesen, MD is a Dermatology in East Setauket, New York. Graduated from University of Utah School of Medicine in 1973, 53 years ago. Licensed in New York.

Years since qualifying
53
Trained at
University of Utah School of Medicine
Licensed in
NY
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

181 N Belle Mead Rd
East Setauket, NY 11733-3495
Phone: (631) 444-4200
Show map & directions

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

Specialties & licences

Dermatology Physician (primary) Taxonomy 207N00000X · Licence 181378 (NY)

Record details

NPI number1205883238
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 27, 2006
Last updated in NPPESJuly 13, 2026

Medicare enrollment

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

Medicare specialtyDERMATOLOGY
Medical schoolUNIVERSITY OF UTAH SCHOOL OF MEDICINE
Graduated 1973 (53 years in practice)
Accepts Medicare assignment Not indicated
Practice locations3 on file with Medicare

Other providers in East Setauket