Quick answers
- Which hospitals does Keith A. Dufendach work at?
- Medicare's official clinician data lists Keith A. Dufendach at 2 hospitals: Sparrow Ionia Hospital and University of Michigan Health - West. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Keith A. Dufendach see patients?
- Medicare's clinician data lists 2 practice locations, including Muskegon, MI and Wyoming, MI. Call before your visit to confirm the address.
- What is Keith A. Dufendach's specialty?
- Medicare lists Thoracic Surgery as the primary specialty, and also Cardiac Surgery.
- Does Keith A. Dufendach accept Medicare assignment?
- Yes. Medicare's clinician data says Keith A. Dufendach 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 Keith A. Dufendach?
- (231) 672-8643, as listed in official Medicare / NPI Registry data.
- What is Keith A. Dufendach's NPI number?
- 1821525429. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Keith A. Dufendach works
Medicare's Facility Affiliation Data lists Keith A. Dufendach at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Sparrow Ionia HospitalIonia, MI · Critical Access Hospital · CCN 231331
- University of Michigan Health - WestWyoming, MI · Acute Care Hospital · CCN 230236
Practice locations
Addresses where Keith A. Dufendach is enrolled with Medicare (CMS data updated 2026-10-02).
- 1560 E Sherman Blvd, Suite 309Muskegon, MI 49444 (231) 672‑8643
- 2122 Health Dr SW, Suite 133Wyoming, MI 49519 (616) 252‑5950
Group practices
Medicare enrollment lists Keith A. Dufendach as a member of these groups (CMS data updated 2026-10-02).
- Metropolitan Hospital415 clinicians in the group
- Mercy Health Partners Sub-Specialty Services35 clinicians in the group
Specialties
- Thoracic Surgeryprimary
- Cardiac Surgeryalso
Other thoracic surgeons in Michigan
Clinicians with the same Medicare primary specialty in Michigan — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Perelman School Of Med At The University Of Pennsylvania |
| Graduation year | 2017 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1821525429 |
| 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