Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Español Near me My list Help
US Patient GuideUSA
Surprise me
Urology

Mark Horowitz, MD

Sees patients in New Hyde Park, NY · New York

Summary

Mark Horowitz, MD (Urology) is enrolled with Medicare at 1 practice location in New Hyde Park, NY. NPI 1881689008. Medicare data says the clinician accepts Medicare assignment. Source: CMS National Downloadable File, updated 2026-10-02.

Call(516) 365‑4949 NPI Registry record Medicare profile

From official Medicare data

This page shows what Medicare's official clinician data says about Mark Horowitz, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

1Practice location
UrologyPrimary specialty
YesAccepts Medicare assignment
40Years since medical school (graduated 1986)
New York Medical CollegeMedical school
MaleGender (as listed)
New York UniversityGroup practice

Quick answers

Where does Mark Horowitz see patients?
Medicare's clinician data lists 1 practice location in New Hyde Park, NY. Call before your visit to confirm the address.
What is Mark Horowitz's specialty?
Medicare lists Urology as the primary specialty, and also Pediatric Medicine.
Does Mark Horowitz accept Medicare assignment?
Yes. Medicare's clinician data says Mark Horowitz accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
What is the phone number for Mark Horowitz?
(516) 365-4949, as listed in official Medicare / NPI Registry data.
What is Mark Horowitz's NPI number?
1881689008. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Practice locations

Addresses where Mark Horowitz is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Mark Horowitz as a member of this group (CMS data updated 2026-10-02).

  • New York University6,134 clinicians in the group

Specialties

Find other Urology doctors in New York →

Other urologists in New Hyde Park

Clinicians with the same Medicare primary specialty in New Hyde Park, NY — not a recommendation.

All urologists in New Hyde Park →

Clinician information

CredentialMD
Medical schoolNew York Medical College
Graduation year1986
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1881689008
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  2. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  3. Medicare Care Compare — official Medicare tool to look up clinicians