Quick answers
- Which hospitals does Syed Mahmood work at?
- Medicare's official clinician data lists Syed Mahmood at 5 hospitals: Chsli St Joseph Hospital, Good Samaritan Hospital Medical Center, Mercy Medical Center, St Charles Hospital and St Francis Hospital - The Heart Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Syed Mahmood see patients?
- Medicare's clinician data lists 7 practice locations, including Roslyn, NY, West Islip, NY and Rockville Center, NY. Call before your visit to confirm the address.
- What is Syed Mahmood's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty.
- Does Syed Mahmood accept Medicare assignment?
- Yes. Medicare's clinician data says Syed Mahmood 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.
- Does Syed Mahmood offer telehealth?
- Medicare's clinician data says Syed Mahmood offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Syed Mahmood?
- (631) 376-3000, as listed in official Medicare / NPI Registry data.
- What is Syed Mahmood's NPI number?
- 1033430277. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Syed Mahmood works
Medicare's Facility Affiliation Data lists Syed Mahmood at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Chsli St Joseph HospitalBethpage, NY · Acute Care Hospital · CCN 330332
- Good Samaritan Hospital Medical CenterWest Islip, NY · Acute Care Hospital · CCN 330286
- Mercy Medical CenterRockville Centre, NY · Acute Care Hospital · CCN 330259
- St Charles HospitalPort Jefferson, NY · Acute Care Hospital · CCN 330246
- St Francis Hospital - The Heart CenterRoslyn, NY · Acute Care Hospital · CCN 330182
Practice locations
Addresses where Syed Mahmood is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 7; the Medicare profile lists all.
- 100 Port Washington BlvdRoslyn, NY 11576
- 1000 Montauk HwyWest Islip, NY 11795 (631) 376‑3000
- 1000 N Village AveRockville Center, NY 11570
- 111 Beach DrWest Islip, NY 11795 (631) 587‑1600
- 200 Belle Terre RdPort Jefferson, NY 11777
Group practices
Medicare enrollment lists Syed Mahmood as a member of this group (CMS data updated 2026-10-02).
- CHS Physician Partners PC743 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in New York →
Other cardiologists in Roslyn
Clinicians with the same Medicare primary specialty in Roslyn, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1033430277 |
| 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