Fastenberg, Michael

  • 2020 - 2025

Michael Fastenberg, MD

Fastenberg, Michael
Long Island native Dr. Michael Fastenberg is a board-certified dermatologist at Schweiger Dermatology Group in Smithtown, New York. Dr. Fastenberg attended Jericho High School and received his undergraduate degree from Duke University (cum laude).Dr. Fastenberg returned to Long Island after working and living in various places around the world. He received his medical degree from the Stony Brook School of Medicine (Alpha Omega Alpha) and completed his internship in internal medicine at Winthrop University Hospital in Mineola. He then completed his dermatology residency at the University of North Carolina Hospitals in Chapel Hill, NC.

About Michael Fastenberg, MD

Long Island native Dr. Michael Fastenberg is a board-certified dermatologist at Schweiger Dermatology Group in Smithtown, New York. Dr. Fastenberg attended Jericho High School and received his undergraduate degree from Duke University (cum laude).Dr. Fastenberg returned to Long Island after working and living in various places around the world. He received his medical degree from the Stony Brook School of Medicine (Alpha Omega Alpha) and completed his internship in internal medicine at Winthrop University Hospital in Mineola. He then completed his dermatology residency at the University of North Carolina Hospitals in Chapel Hill, NC.

  • 2020 - 2025

He has performed research in biochemistry, cell biology and dermatology, has been published in peer reviewed journals and has presented at local and national meetings. Dr. Fastenberg specializes in general adult, pediatric and surgical dermatology as well as cosmetic dermatology, including Botox, fillers and laser procedures. Dr. Fastenberg is on faculty at St. Catherine of Siena Medical Center in Smithtown, NY.

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About Schweiger Dermatology Group

At Schweiger Dermatology Group, we believe no one should wait to feel confident in their own skin. That's why we're committed to delivering The Ultimate Patient Experience—expert care that's fast, compassionate, and seamless. Founded by Dr. Eric Schweiger in 2010 to eliminate long wait times for high quality dermatologists, we've grown into the nation's leading dermatology practice, with hundreds of locations across the country and millions of satisfied patients. We offer medical, cosmetic, and surgical dermatology, as well as allergy services—in modern, state-of-the-art offices. Most new patients are seen within days, and we accept most insurances and handle billing for you. Whether it's a skin concern or a cosmetic goal, we make it easy to get the care you need—without the wait.