Quick answers
- Which hospitals does Steven Mast work at?
- Medicare's official clinician data lists Steven Mast at 5 hospitals: Corewell Health Ludington Hospital, Great Falls Clinic Hospital, Mercy Health Lakeshore Campus, Trinity Health Grand Haven Hospital and Trinity Health Muskegon Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Steven Mast see patients?
- Medicare's clinician data lists 2 practice locations, including Muskegon, MI. Call before your visit to confirm the address.
- What is Steven Mast's specialty?
- Medicare lists Interventional Cardiology as the primary specialty, and also Cardiovascular Disease (Cardiology).
- Does Steven Mast accept Medicare assignment?
- Yes. Medicare's clinician data says Steven Mast 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 Steven Mast?
- (231) 672-3500, as listed in official Medicare / NPI Registry data.
- What is Steven Mast's NPI number?
- 1174522429. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Steven Mast works
Medicare's Facility Affiliation Data lists Steven Mast at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Corewell Health Ludington HospitalLudington, MI · Acute Care Hospital · CCN 230110
- Great Falls Clinic HospitalGreat Falls, MT · Acute Care Hospital · CCN 270086
- Mercy Health Lakeshore CampusShelby, MI · Critical Access Hospital · CCN 231320
- Trinity Health Grand Haven HospitalGrand Haven, MI · Acute Care Hospital · CCN 230174
- Trinity Health Muskegon HospitalMuskegon, MI · Acute Care Hospital · CCN 230066
Practice locations
Addresses where Steven Mast is enrolled with Medicare (CMS data updated 2026-10-02).
- 1212 E Sherman BlvdMuskegon, MI 49444 (231) 672‑3500
- 1223 Mercy DrMuskegon, MI 49444 (231) 672‑3500
Group practices
Medicare enrollment lists Steven Mast as a member of this group (CMS data updated 2026-10-02).
- Mercy Health Westshore Cardiology Services37 clinicians in the group
Specialties
Other interventional cardiologists in Michigan
Clinicians with the same Medicare primary specialty in Michigan — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, San Diego School Of Medicine |
| Graduation year | 1993 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1174522429 |
| 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