Quick answers
- Where does Mary E. Greene see patients?
- Medicare's clinician data lists 2 practice locations, including Freeport, NY and New York, NY. Call before your visit to confirm the address.
- What is Mary E. Greene's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty, and also Hospitalist and Interventional Cardiology.
- Does Mary E. Greene accept Medicare assignment?
- Yes. Medicare's clinician data says Mary E. Greene 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 Mary E. Greene offer telehealth?
- Medicare's clinician data says Mary E. Greene offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mary E. Greene?
- (516) 546-9200, as listed in official Medicare / NPI Registry data.
- What is Mary E. Greene's NPI number?
- 1801152699. 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 Mary E. Greene is enrolled with Medicare (CMS data updated 2026-10-02).
- 115 W Sunrise HwyFreeport, NY 11520 (516) 546‑9200
- 211 E 51st StNew York, NY 10022 (212) 906‑7798
Group practices
Medicare enrollment lists Mary E. Greene as a member of these groups (CMS data updated 2026-10-02).
- Medical Office of Manhattan PLLC35 clinicians in the group
- Western Nassau Diagnostic Imaging Services PC9 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in New York →
Other cardiologists in Freeport
Clinicians with the same Medicare primary specialty in Freeport, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2012 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1801152699 |
| 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