Quick answers
- Which hospitals does Robert B. Stewart work at?
- Medicare's official clinician data lists Robert B. Stewart at 3 hospitals: Cascade Valley Hospital, Island Hospital and Skagit Valley Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Robert B. Stewart see patients?
- Medicare's clinician data lists 6 practice locations, including Mount Vernon, WA, Anacortes, WA and Arlington, WA. Call before your visit to confirm the address.
- What is Robert B. Stewart's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty.
- Does Robert B. Stewart accept Medicare assignment?
- Yes. Medicare's clinician data says Robert B. Stewart 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 Robert B. Stewart?
- (360) 428-2500, as listed in official Medicare / NPI Registry data.
- What is Robert B. Stewart's NPI number?
- 1578599445. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Robert B. Stewart works
Medicare's Facility Affiliation Data lists Robert B. Stewart at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Cascade Valley HospitalArlington, WA · Acute Care Hospital · CCN 500060
- Island HospitalAnacortes, WA · Acute Care Hospital · CCN 500007
- Skagit Valley HospitalMount Vernon, WA · Acute Care Hospital · CCN 500003
Practice locations
Addresses where Robert B. Stewart is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 1400 E Kincaid StMount Vernon, WA 98274 (360) 428‑2500
- 1415 E Kincaid StMount Vernon, WA 98274 (360) 416‑5750
- 211 S 13th StMount Vernon, WA 98274 (360) 814‑5900
- 2511 M Ave, Suite DAnacortes, WA 98221 (360) 293‑0308
- 307 S 13th St, Suite 300Mount Vernon, WA 98274 (360) 336‑9757
Group practices
Medicare enrollment lists Robert B. Stewart as a member of this group (CMS data updated 2026-10-02).
- Public Hospital Dist No 1 Skagit323 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 | University Of Washington School Of Medicine |
| Graduation year | 1988 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1578599445 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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