Quick answers
- Which hospitals does Mark Henry D. Alon work at?
- Medicare's official clinician data lists Mark Henry D. Alon at 2 hospitals: Mount Sinai West and White Plains Hospital Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark Henry D. Alon see patients?
- Medicare's clinician data lists 3 practice locations, including New York, NY and White Plains, NY. Call before your visit to confirm the address.
- What is Mark Henry D. Alon's specialty?
- Medicare lists Hospitalist as the primary specialty.
- Does Mark Henry D. Alon accept Medicare assignment?
- Yes. Medicare's clinician data says Mark Henry D. Alon 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 Mark Henry D. Alon?
- (212) 523-6500, as listed in official Medicare / NPI Registry data.
- What is Mark Henry D. Alon's NPI number?
- 1972910164. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark Henry D. Alon works
Medicare's Facility Affiliation Data lists Mark Henry D. Alon at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mount Sinai WestNew York, NY · Acute Care Hospital · CCN 330046
- White Plains Hospital CenterWhite Plains, NY · Acute Care Hospital · CCN 330304
Practice locations
Addresses where Mark Henry D. Alon is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 10th AveNew York, NY 10019 (212) 523‑6500
- 1111 Amsterdam AveNew York, NY 10025 (212) 523‑6500
- 41 E Post RdWhite Plains, NY 10601 (914) 681‑0600
Group practices
Medicare enrollment lists Mark Henry D. Alon as a member of these groups (CMS data updated 2026-10-02).
- Icahn School of Medicine at Mount Sinai2,843 clinicians in the group
- East Post Road Medical Services PC429 clinicians in the group
Specialties
- Hospitalistprimary
Other hospitalists 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) | 1972910164 |
| 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