Quick answers
- Which hospitals does Ruben Diaz work at?
- Medicare's official clinician data lists Ruben Diaz at 2 hospitals: Northern Westchester Hospital and Phelps Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ruben Diaz see patients?
- Medicare's clinician data lists 2 practice locations, including New York, NY and Sleepy Hollow, NY. Call before your visit to confirm the address.
- What is Ruben Diaz's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Ruben Diaz accept Medicare assignment?
- Yes. Medicare's clinician data says Ruben Diaz 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.
- Does Ruben Diaz offer telehealth?
- Medicare's clinician data says Ruben Diaz offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Ruben Diaz?
- (212) 639-2000, as listed in official Medicare / NPI Registry data.
- What is Ruben Diaz's NPI number?
- 1073941225. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ruben Diaz works
Medicare's Facility Affiliation Data lists Ruben Diaz at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northern Westchester HospitalMount Kisco, NY · Acute Care Hospital · CCN 330162
- Phelps HospitalSleepy Hollow, NY · Acute Care Hospital · CCN 330261
Practice locations
Addresses where Ruben Diaz is enrolled with Medicare (CMS data updated 2026-10-02).
- 1275 York AveNew York, NY 10065 (212) 639‑2000
- 701 N BroadwaySleepy Hollow, NY 10591 (914) 298‑2620
Group practices
Medicare enrollment lists Ruben Diaz as a member of these groups (CMS data updated 2026-10-02).
- North Shore-Lij Medical PC6,440 clinicians in the group
- Memorial Endocrine Group19 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2013 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1073941225 |
| 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