Quick answers
- Which hospitals does Ernesto Grenier work at?
- Medicare's official clinician data lists Ernesto Grenier at 2 hospitals: Jackson Health System and Lower Keys Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ernesto Grenier see patients?
- Medicare's clinician data lists 3 practice locations, including Key West, FL and Miami, FL. Call before your visit to confirm the address.
- What is Ernesto Grenier's specialty?
- Medicare lists Psychiatry as the primary specialty.
- Does Ernesto Grenier accept Medicare assignment?
- Yes. Medicare's clinician data says Ernesto Grenier 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 Ernesto Grenier?
- (305) 585-1111, as listed in official Medicare / NPI Registry data.
- What is Ernesto Grenier's NPI number?
- 1366614927. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ernesto Grenier works
Medicare's Facility Affiliation Data lists Ernesto Grenier at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Jackson Health SystemMiami, FL · Acute Care Hospital · CCN 100022
- Lower Keys Medical CenterKey West, FL · Acute Care Hospital · CCN 100150
Practice locations
Addresses where Ernesto Grenier is enrolled with Medicare (CMS data updated 2026-10-02).
- 1111 12th StKey West, FL 33040
- 1200 Kennedy DrKey West, FL 33040
- 1611 NW 12 AveMiami, FL 33136 (305) 585‑1111
Group practices
Medicare enrollment lists Ernesto Grenier as a member of these groups (CMS data updated 2026-10-02).
- Public Health Trust of Miami Dade County Florida457 clinicians in the group
- Key West Hma Physician Management LLC33 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Key West
Clinicians with the same Medicare primary specialty in Key West, FL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1999 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366614927 |
| 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