Quick answers
- Which hospitals does Mark A. Nelson work at?
- Medicare's official clinician data lists Mark A. Nelson at 2 hospitals: Mercy Medical Center and North Shore University Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark A. Nelson see patients?
- Medicare's clinician data lists 2 practice locations, including Lynbrook, NY. Call before your visit to confirm the address.
- What is Mark A. Nelson's specialty?
- Medicare lists Neurology as the primary specialty.
- Does Mark A. Nelson accept Medicare assignment?
- Yes. Medicare's clinician data says Mark A. Nelson 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 Mark A. Nelson offer telehealth?
- Medicare's clinician data says Mark A. Nelson offers telehealth services. Ask the office which visits can be done by video or phone.
- What is Mark A. Nelson's NPI number?
- 1922084409. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark A. Nelson works
Medicare's Facility Affiliation Data lists Mark A. Nelson at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Medical CenterRockville Centre, NY · Acute Care Hospital · CCN 330259
- North Shore University HospitalManhasset, NY · Acute Care Hospital · CCN 330106
Practice locations
Addresses where Mark A. Nelson is enrolled with Medicare (CMS data updated 2026-10-02).
- 360 Merrick Rd, Fl 1Lynbrook, NY 11563
- 777 Sunrise Hwy, Suite 200Lynbrook, NY 11563
Group practices
Medicare enrollment lists Mark A. Nelson as a member of this group (CMS data updated 2026-10-02).
- Long Island Neurology Consultants8 clinicians in the group
Specialties
- Neurologyprimary
Other neurologists in Lynbrook
Clinicians with the same Medicare primary specialty in Lynbrook, NY — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | New York College Of Osteo Medicine Of New York Institute Of Technology |
| Graduation year | 1992 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1922084409 |
| 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