Quick answers
- Where does Nelson Barcelon see patients?
- Medicare's clinician data lists 2 practice locations, including Syosset, NY and Mount Kisco, NY. Call before your visit to confirm the address.
- What is Nelson Barcelon's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does Nelson Barcelon accept Medicare assignment?
- Yes. Medicare's clinician data says Nelson Barcelon 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.
- What is the phone number for Nelson Barcelon?
- (516) 696-2977, as listed in official Medicare / NPI Registry data.
- What is Nelson Barcelon's NPI number?
- 1003928441. 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 Nelson Barcelon is enrolled with Medicare (CMS data updated 2026-10-02).
- 575 Underhill BlvdSyosset, NY 11791 (516) 696‑2977
- 90 S Bedford RdMount Kisco, NY 10549 (914) 241‑1050
Group practices
Medicare enrollment lists Nelson Barcelon as a member of this group (CMS data updated 2026-10-02).
- Optum Medical Care PC1,010 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Syosset
Clinicians with the same Medicare primary specialty in Syosset, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1003928441 |
| 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