Quick answers
- Where does Steven L. Grainer see patients?
- Medicare's clinician data lists 1 practice location in Seaford, NY. Call before your visit to confirm the address.
- What is Steven L. Grainer's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty, and also Internal Medicine.
- Does Steven L. Grainer accept Medicare assignment?
- Yes. Medicare's clinician data says Steven L. Grainer 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 Steven L. Grainer offer telehealth?
- Medicare's clinician data says Steven L. Grainer offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Steven L. Grainer?
- (516) 809-4200, as listed in official Medicare / NPI Registry data.
- What is Steven L. Grainer's NPI number?
- 1861441800. 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 Steven L. Grainer is enrolled with Medicare (CMS data updated 2026-10-02).
- 850 Hicksville RdSeaford, NY 11783 (516) 809‑4200
Group practices
Medicare enrollment lists Steven L. Grainer as a member of this group (CMS data updated 2026-10-02).
- Northwell Healthcare Inc18 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in New York →
Other cardiologists in Seaford
Clinicians with the same Medicare primary specialty in Seaford, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1985 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1861441800 |
| 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