Quick answers
- Where does Gwen E. Mercer see patients?
- Medicare's clinician data lists 2 practice locations, including Baldwinsville, NY and East Syracuse, NY. Call before your visit to confirm the address.
- What is Gwen E. Mercer's specialty?
- Medicare lists Hematology/Oncology as the primary specialty.
- Does Gwen E. Mercer accept Medicare assignment?
- Medicare's clinician data says Gwen E. Mercer may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is Gwen E. Mercer's NPI number?
- 1174447502. 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 Gwen E. Mercer is enrolled with Medicare (CMS data updated 2026-10-02).
- 2254 Connell TerBaldwinsville, NY 13027
- 5008 Brittonfield Pkwy, Suite 700East Syracuse, NY 13057
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2026 |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1174447502 |
| 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