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Dr. Mark Horowitz, MD

Urology (Urology Physician)

At a glance

Medical school
New York Medical College (1986)
Years since graduation
40
In the NPI registry since
2005

The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is

Education and training

  • 1986Medical school: New York Medical College
  • 2005Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier

Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).

Specialties and state licenses

  • Urology Physician primary
    NY license 172766
  • Pediatric Urology Physician
    NY license 172766

As reported to the NPI registry. To confirm a license is current, check the state medical board.

Map: Urology per capita by county →

Where they work

Medical groups

Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.

Other Urology clinicians in Flushing

Sources

NPI registry (CMS NPPES, November 2026; record last updated July 30, 2015), Medicare Care Compare, Medicare Physician & Other Practitioners (2024), Medicare Part D Prescribers (2024) and Open Payments (2025). Information is self-reported or billed data and may be out of date; call before visiting.

NPI 1881689008. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.