Quick answers
- Does Margaret S. Mercer accept Medicare assignment?
- Medicare's clinician data says Margaret S. Mercer may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- What is Margaret S. Mercer's NPI number?
- 1508001934. 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 Margaret S. Mercer is enrolled with Medicare (CMS data updated October 2, 2026).
- 1 Riverfront PlzWestbrook, ME 04092
- 4800 N Scottsdale Rd, Suite 2500Scottsdale, AZ 85251
Specialties
- Clinical Social Workerprimary
Other clinical social workers in Westbrook
Clinicians with the same Medicare primary specialty in Westbrook, ME — not a recommendation.
Clinician information
| Credential | CSW |
|---|---|
| Graduation year | 2006 |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1508001934 |
| 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 October 2, 2026, retrieved October 29, 2026
- 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