Quick answers
- Which hospitals does Gary K. Lefkowitz work at?
- Medicare's official clinician data lists Gary K. Lefkowitz at 2 hospitals: Mercy Medical Center and Mount Sinai South Nassau. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gary K. Lefkowitz see patients?
- Medicare's clinician data lists 5 practice locations, including Rockville Centre, NY, Oceanside, NY and Farmingdale, NY. Call before your visit to confirm the address.
- What is Gary K. Lefkowitz's specialty?
- Medicare lists Urology as the primary specialty.
- Does Gary K. Lefkowitz accept Medicare assignment?
- Yes. Medicare's clinician data says Gary K. Lefkowitz 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 Gary K. Lefkowitz?
- (516) 766-2929, as listed in official Medicare / NPI Registry data.
- What is Gary K. Lefkowitz's NPI number?
- 1851335434. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gary K. Lefkowitz works
Medicare's Facility Affiliation Data lists Gary K. Lefkowitz at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Medical CenterRockville Centre, NY · Acute Care Hospital · CCN 330259
- Mount Sinai South NassauOceanside, NY · Acute Care Hospital · CCN 330198
Practice locations
Addresses where Gary K. Lefkowitz is enrolled with Medicare (CMS data updated 2026-10-02).
- 143 N Long Beach Rd, Suite 1Rockville Centre, NY 11570 (516) 766‑2929
- 2445 Oceanside RdOceanside, NY 11572 (516) 632‑3000
- 340 Broadhollow Rd, Suite EFarmingdale, NY 11735 (516) 280‑7930
- 4100 Duff Pl, ASeaford, NY 11783 (516) 520‑8080
- 4295 Hempstead TpkeBethpage, NY 11714 (516) 579‑6000
Group practices
Medicare enrollment lists Gary K. Lefkowitz as a member of this group (CMS data updated 2026-10-02).
- Integrated Medical Professionals PLLC91 clinicians in the group
Specialties
- Urologyprimary
Other urologists in Rockville Centre
Clinicians with the same Medicare primary specialty in Rockville Centre, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York University School Of Medicine |
| Graduation year | 1997 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1851335434 |
| Corrections | Report 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians