Quick answers
- Which hospitals does Margaret Sullivan work at?
- Medicare's official clinician data lists Margaret Sullivan at 1 hospital: Lenox Hill Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Margaret Sullivan see patients?
- Medicare's clinician data lists 2 practice locations, including New York, NY. Call before your visit to confirm the address.
- What is Margaret Sullivan's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty.
- Does Margaret Sullivan accept Medicare assignment?
- Yes. Medicare's clinician data says Margaret Sullivan 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 Margaret Sullivan offer telehealth?
- Medicare's clinician data says Margaret Sullivan offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Margaret Sullivan?
- (212) 772-2971, as listed in official Medicare / NPI Registry data.
- What is Margaret Sullivan's NPI number?
- 1962513440. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Margaret Sullivan works
Medicare's Facility Affiliation Data lists Margaret Sullivan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Lenox Hill HospitalNew York, NY · Acute Care Hospital · CCN 330119
Practice locations
Addresses where Margaret Sullivan is enrolled with Medicare (CMS data updated 2026-10-02).
- 8 E 83 StNew York, NY 10028 (212) 772‑2971
- 8 E 83rd St, Suite 1bNew York, NY 10028
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in New York →
Other cardiologists in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loyola University Of Chicago, Stritch School Of Medicine |
| Graduation year | 1990 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1962513440 |
| 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