Quick answers
- Which hospitals does John R. Mathis Jr. work at?
- Medicare's official clinician data lists John R. Mathis Jr. at 5 hospitals: Island Hospital, PeaceHealth Peace Island Medical Center, Skagit Valley Hospital, Virginia Mason Medical Center and Whidbeyhealth Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John R. Mathis Jr. see patients?
- Medicare's clinician data lists 2 practice locations, including Anacortes, WA and Glenview, IL. Call before your visit to confirm the address.
- What is John R. Mathis Jr.'s specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does John R. Mathis Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says John R. Mathis Jr. 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 John R. Mathis Jr.?
- (360) 299-1350, as listed in official Medicare / NPI Registry data.
- What is John R. Mathis Jr.'s NPI number?
- 1780754739. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John R. Mathis Jr. works
Medicare's Facility Affiliation Data lists John R. Mathis Jr. at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Island HospitalAnacortes, WA · Acute Care Hospital · CCN 500007
- PeaceHealth Peace Island Medical CenterFriday Harbor, WA · Critical Access Hospital · CCN 501340
- Skagit Valley HospitalMount Vernon, WA · Acute Care Hospital · CCN 500003
- Virginia Mason Medical CenterSeattle, WA · Acute Care Hospital · CCN 500005
- Whidbeyhealth Medical CenterCoupeville, WA · Critical Access Hospital · CCN 501339
Practice locations
Addresses where John R. Mathis Jr. is enrolled with Medicare (CMS data updated 2026-10-02).
- 1211 24th StAnacortes, WA 98221 (360) 299‑1350
- 2600 Compass RdGlenview, IL 60026
Group practices
Medicare enrollment lists John R. Mathis Jr. as a member of these groups (CMS data updated 2026-10-02).
- Select Rehabilitation, LLC2,046 clinicians in the group
- Select Outpatient Services Inc805 clinicians in the group
- Public Hospital District No 2 Skagit County Washington76 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Anacortes
Clinicians with the same Medicare primary specialty in Anacortes, WA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Utah School Of Medicine |
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1780754739 |
| 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