Quick answers
- Where does Marshall A. Corson see patients?
- Medicare's clinician data lists 2 practice locations, including Coupeville, WA and Anacortes, WA. Call before your visit to confirm the address.
- What is Marshall A. Corson's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty.
- Does Marshall A. Corson accept Medicare assignment?
- Yes. Medicare's clinician data says Marshall A. Corson 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 Marshall A. Corson?
- (360) 678-5151, as listed in official Medicare / NPI Registry data.
- What is Marshall A. Corson's NPI number?
- 1548346349. 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 Marshall A. Corson is enrolled with Medicare (CMS data updated 2026-10-02).
- 101 N Main StCoupeville, WA 98239
- 1211 24th StAnacortes, WA 98221 (360) 678‑5151
Group practices
Medicare enrollment lists Marshall A. Corson as a member of this group (CMS data updated 2026-10-02).
- Whidbey Island Public Hospital District103 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Washington →
Other cardiologists in Washington
Clinicians with the same Medicare primary specialty in Washington — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Baylor College Of Medicine |
| Graduation year | 1981 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548346349 |
| 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