Quick answers
- Which hospitals does James I. Youssef work at?
- Medicare's official clinician data lists James I. Youssef at 4 hospitals: Kaleida Health, Mount Sinai Beth Israel, Mount Sinai Hospital and Mount Sinai West. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does James I. Youssef see patients?
- Medicare's clinician data lists 5 practice locations, including New York, NY, Buffalo, NY and Williamsville, NY. Call before your visit to confirm the address.
- What is James I. Youssef's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty, and also Advanced Heart Failure and Transplant Cardiology.
- Does James I. Youssef accept Medicare assignment?
- Yes. Medicare's clinician data says James I. Youssef 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 James I. Youssef?
- (212) 731-7822, as listed in official Medicare / NPI Registry data.
- What is James I. Youssef's NPI number?
- 1417273152. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where James I. Youssef works
Medicare's Facility Affiliation Data lists James I. Youssef at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Kaleida HealthBuffalo, NY · Acute Care Hospital · CCN 330005
- Mount Sinai Beth IsraelNew York, NY · Acute Care Hospital · closed, according to its website · CCN 330169
- Mount Sinai HospitalNew York, NY · Acute Care Hospital · CCN 330024
- Mount Sinai WestNew York, NY · Acute Care Hospital · CCN 330046
Practice locations
Addresses where James I. Youssef is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Gustave L Levy PlNew York, NY 10029 (212) 731‑7822
- 100 High StBuffalo, NY 14203
- 1111 Amsterdam AveNew York, NY 10025 (212) 420‑3581
- 1540 Maple RdWilliamsville, NY 14221 (716) 568‑3600
- 3898 Vineyard DrDunkirk, NY 14048 (716) 710‑8266
Group practices
Medicare enrollment lists James I. Youssef as a member of these groups (CMS data updated 2026-10-02).
- Icahn School of Medicine at Mount Sinai2,843 clinicians in the group
- General Physician PC501 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in New York →
Other cardiologists in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2009 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1417273152 |
| 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