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

Siamak Tadayon, PAC

Individual provider Surgical Physician Assistant · NPI 1366596272

Siamak Tadayon, PAC is a Surgical Physician Assistant in NY, New York. Practices as a sole proprietor. Licensed in New York.

Licensed in
NY
In the registry since
2007
What do these letters mean?
PAC — Physician Assistant, Certified
A physician assistant holding current national certification; usually written PA-C.

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Practice location Address checks out

1901 First Av Metropolitan Hospital Surgery Dep
NY, NY 10029 Not confirmed with CMS for 19 years — call before visiting
Phone: (212) 423-6614
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Surgical Physician Assistant (primary) Taxonomy 363AS0400X · Licence 008794-1 (NY)

Record details

NPI number1366596272
Entity typeIndividual (Type 1)
GenderMale
Credentials PAC
Sole proprietorYes
NPI enumeratedJanuary 22, 2007
Last updated in NPPESJuly 8, 2007

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 patients25
Services billed 29 a service is one billed item, such as a visit, a test or a procedure
Average patient age65

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.

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