Quick answers
- Where does Mary Barton see patients?
- Medicare's clinician data lists 2 practice locations, including Washington, DC and Chevy Chase, MD. Call before your visit to confirm the address.
- What is Mary Barton's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Mary Barton accept Medicare assignment?
- Medicare's clinician data says Mary Barton may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is Mary Barton's NPI number?
- 1225971526. 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 Mary Barton is enrolled with Medicare (CMS data updated 2026-10-02).
- 2333 Ontario Rd NWWashington, DC 20009
- 6306 Broad Branch RdChevy Chase, MD 20815
Specialties
- Internal Medicineprimary
Find other Internal Medicine doctors in District of Columbia →
Other internal medicine doctors in Washington
Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1991 |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1225971526 |
| 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