Quick answers
- Which hospitals does Stephen J. Mattichak work at?
- Medicare's official clinician data lists Stephen J. Mattichak at 5 hospitals: Bay Area Hospital, MyMichigan Medical Center Alma, MyMichigan Medical Center Clare, MyMichigan Medical Center Gladwin and MyMichigan Medical Center Midland. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Stephen J. Mattichak see patients?
- Medicare's clinician data lists 13 practice locations, including Coos Bay, OR, Midland, MI and Alma, MI. Call before your visit to confirm the address.
- What is Stephen J. Mattichak's specialty?
- Medicare lists Interventional Cardiology as the primary specialty, and also Cardiovascular Disease (Cardiology).
- Does Stephen J. Mattichak accept Medicare assignment?
- Yes. Medicare's clinician data says Stephen J. Mattichak 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 Stephen J. Mattichak?
- (541) 269-8280, as listed in official Medicare / NPI Registry data.
- What is Stephen J. Mattichak's NPI number?
- 1013930189. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Stephen J. Mattichak works
Medicare's Facility Affiliation Data lists Stephen J. Mattichak at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Bay Area HospitalCoos Bay, OR · Acute Care Hospital · CCN 380090
- MyMichigan Medical Center AlmaAlma, MI · Acute Care Hospital · CCN 230030
- MyMichigan Medical Center ClareClare, MI · Acute Care Hospital · CCN 230180
- MyMichigan Medical Center GladwinGladwin, MI · Critical Access Hospital · CCN 231325
- MyMichigan Medical Center MidlandMidland, MI · Acute Care Hospital · CCN 230222
Practice locations
Addresses where Stephen J. Mattichak is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 13; the Medicare profile lists all.
- 1775 Thompson RdCoos Bay, OR 97420 (541) 269‑8280
- 2650 N 17th StCoos Bay, OR 97420 (541) 269‑8282
- 2660 W Sugnet RdMidland, MI 48640
- 300 E Warwick DrAlma, MI 48801
- 3051 Kiesel RdBay City, MI 48706
Group practices
Medicare enrollment lists Stephen J. Mattichak as a member of these groups (CMS data updated 2026-10-02).
- MyMichigan Medical Center Midland507 clinicians in the group
- Bay Area Hospital District122 clinicians in the group
Specialties
Other interventional cardiologists in Coos Bay
Clinicians with the same Medicare primary specialty in Coos Bay, OR — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Wayne State University School Of Medicine |
| Graduation year | 1997 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1013930189 |
| 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