Quick answers
- Where does Robert S. Greenbaum see patients?
- Medicare's clinician data lists 2 practice locations, including Lagrangeville, NY and Yonkers, NY. Call before your visit to confirm the address.
- What is Robert S. Greenbaum's specialty?
- Medicare lists Optometry as the primary specialty.
- Does Robert S. Greenbaum accept Medicare assignment?
- Yes. Medicare's clinician data says Robert S. Greenbaum 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 Robert S. Greenbaum?
- (845) 473-0220, as listed in official Medicare / NPI Registry data.
- What is Robert S. Greenbaum's NPI number?
- 1750387973. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Robert S. Greenbaum is enrolled with Medicare (CMS data updated 2026-10-02).
- 1110 State Route 55, Suite 105Lagrangeville, NY 12540 (845) 473‑0220
- 1765 Central Park AveYonkers, NY 10710 (914) 961‑1004
Group practices
Medicare enrollment lists Robert S. Greenbaum as a member of this group (CMS data updated 2026-10-02).
- 200 West Optics LLC38 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Lagrangeville
Clinicians with the same Medicare primary specialty in Lagrangeville, NY — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Medical school | State University Of New York - State College Optometry |
| Graduation year | 1984 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1750387973 |
| 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
- 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