Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Michael Fastenberg, MD

Individual provider Dermatology Physician · NPI 1073735593

Michael Fastenberg, MD practises Dermatology in Smithtown, New York. Graduated from State University of New York at Stony Brook, School of Medicine in 2005, 21 years ago. Practices with Schweiger Dermatology PLLC, a 248-clinician group and accepts Medicare assignment. Licensed in North Carolina and New York.

Years since qualifying
21
Trained at
State University of New York at Stony Brook, School of Medicine
Licensed in
NC, NY
In the registry since
2007
Specialties on file
2
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

260 Middle Country Rd Ste 208
Smithtown, NY 11787-2982 Not confirmed with CMS for 15 years — call before visiting
Phone: (631) 863-3223
Fax: (631) 863-3334
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Dermatology Physician (primary) Taxonomy 207N00000X · Licence 252150-1 (NY)
Dermatology Physician Taxonomy 207N00000X · Licence 2006-01943 (NC)

Record details

NPI number1073735593
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 3, 2007
Last updated in NPPESJanuary 26, 2011

Medicare enrollment

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

Medicare specialtyDERMATOLOGY
Medical schoolSTATE UNIVERSITY OF NEW YORK AT STONY BROOK, SCHOOL OF MEDICINE
Graduated 2005 (21 years in practice)
Group practice Schweiger Dermatology Pllc — 248 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 2,993 times · 99th percentile
Skin biopsy 214 times · 86th percentile
Removal or shaving of skin growth 12 times · 66th 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 patients1,072
Services billed 7,880 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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.

Consulting Fee $34,638 13 payments
Compensation for services other than consulting , including serving as faculty or as a speaker at a venue other than a continuing education program $23,275 10 payments
Food and Beverage $7,889 264 payments · a meal or drink at a meeting or visit, not a fee
Travel and Lodging $1,506 7 payments · travel or lodging paid or reimbursed, such as to attend a conference

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 Schweiger Dermatology PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 248 clinicians in the practice; 12 are shown here.

Other providers in Smithtown