Quick answers
- Which hospitals does Gregory Ackert work at?
- Medicare's official clinician data lists Gregory Ackert at 5 hospitals: Chsli St Joseph Hospital, Good Samaritan Hospital Medical Center, Long Island Jewish Medical Center, North Shore University Hospital and St Francis Hospital - The Heart Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory Ackert see patients?
- Medicare's clinician data lists 2 practice locations, including New Hyde Park, NY. Call before your visit to confirm the address.
- What is Gregory Ackert's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Gastroenterology.
- Does Gregory Ackert accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory Ackert 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 Gregory Ackert offer telehealth?
- Medicare's clinician data says Gregory Ackert offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Gregory Ackert?
- (516) 627-5430, as listed in official Medicare / NPI Registry data.
- What is Gregory Ackert's NPI number?
- 1417991803. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregory Ackert works
Medicare's Facility Affiliation Data lists Gregory Ackert at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Chsli St Joseph HospitalBethpage, NY · Acute Care Hospital · CCN 330332
- Good Samaritan Hospital Medical CenterWest Islip, NY · Acute Care Hospital · CCN 330286
- Long Island Jewish Medical CenterNew Hyde Park, NY · Acute Care Hospital · CCN 330195
- North Shore University HospitalManhasset, NY · Acute Care Hospital · CCN 330106
- St Francis Hospital - The Heart CenterRoslyn, NY · Acute Care Hospital · CCN 330182
Practice locations
Addresses where Gregory Ackert is enrolled with Medicare (CMS data updated 2026-10-02).
- 1983 Marcus Ave, Suite E124New Hyde Park, NY 11042 (516) 627‑5430
- 4 Ohio Dr, Suite 200New Hyde Park, NY 11042 (518) 775‑5454
Group practices
Medicare enrollment lists Gregory Ackert as a member of these groups (CMS data updated 2026-10-02).
- CHS Physician Partners PC743 clinicians in the group
- Long Island Cardiovascular Imaging Consultants, PC4 clinicians in the group
Specialties
- Internal Medicineprimary
- Gastroenterologyalso
Other internal medicine doctors in New Hyde Park
Clinicians with the same Medicare primary specialty in New Hyde Park, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York University School Of Medicine |
| Graduation year | 1978 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1417991803 |
| 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