Quick answers
- Which hospitals does Ernest Garnier work at?
- Medicare's official clinician data lists Ernest Garnier at 2 hospitals: Mount Sinai Hospital and Suny/Downstate University Hospital of Brooklyn. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ernest Garnier see patients?
- Medicare's clinician data lists 2 practice locations, including New York, NY and Brooklyn, NY. Call before your visit to confirm the address.
- What is Ernest Garnier's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Hospitalist.
- Does Ernest Garnier accept Medicare assignment?
- Yes. Medicare's clinician data says Ernest Garnier 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 Ernest Garnier?
- (212) 659-8551, as listed in official Medicare / NPI Registry data.
- What is Ernest Garnier's NPI number?
- 1942294566. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ernest Garnier works
Medicare's Facility Affiliation Data lists Ernest Garnier at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mount Sinai HospitalNew York, NY · Acute Care Hospital · CCN 330024
- Suny/Downstate University Hospital of BrooklynBrooklyn, NY · Acute Care Hospital · CCN 330350
Practice locations
Addresses where Ernest Garnier is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 Gustave L Levy PlNew York, NY 10029 (212) 659‑8551
- 470 Clarkson AveBrooklyn, NY 11203 (718) 270‑1000
Group practices
Medicare enrollment lists Ernest Garnier as a member of these groups (CMS data updated 2026-10-02).
- Icahn School of Medicine at Mount Sinai2,843 clinicians in the group
- University Hospital of Brooklyn SUNY Downstate Health Sciences Univers92 clinicians in the group
Specialties
- Internal Medicineprimary
- Hospitalistalso
Other internal medicine doctors in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York Downstate Medical Center |
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1942294566 |
| 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