Quick answers
- Which hospitals does John Alexis work at?
- Medicare's official clinician data lists John Alexis at 1 hospital: Mount Sinai Medical Center of Florida, Inc. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John Alexis see patients?
- Medicare's clinician data lists 2 practice locations, including Aventura, FL and Miami, FL. Call before your visit to confirm the address.
- What is John Alexis's specialty?
- Medicare lists Pathology as the primary specialty.
- Does John Alexis accept Medicare assignment?
- Yes. Medicare's clinician data says John Alexis 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 John Alexis?
- (305) 674-2277, as listed in official Medicare / NPI Registry data.
- What is John Alexis's NPI number?
- 1215902143. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John Alexis works
Medicare's Facility Affiliation Data lists John Alexis at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mount Sinai Medical Center of Florida, IncMiami Beach, FL · Acute Care Hospital · CCN 100034
Practice locations
Addresses where John Alexis is enrolled with Medicare (CMS data updated 2026-10-02).
- 2845 Aventura BlvdAventura, FL 33180 (305) 674‑2277
- 4300 Alton RdMiami, FL 33140 (305) 674‑2277
Group practices
Medicare enrollment lists John Alexis as a member of this group (CMS data updated 2026-10-02).
- Am Rywlin MD and Assoc PA8 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Aventura
Clinicians with the same Medicare primary specialty in Aventura, FL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1984 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1215902143 |
| 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