Quick answers
- Which hospitals does John Duhn work at?
- Medicare's official clinician data lists John Duhn at 2 hospitals: Mercy Health Saint Mary's and Spectrum Health. This is where the clinician works or has privileges; call the hospital to confirm.
- What is John Duhn's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does John Duhn accept Medicare assignment?
- Yes. Medicare's clinician data says John Duhn 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.
- Does John Duhn offer telehealth?
- Medicare's clinician data says John Duhn offers telehealth services. Ask the office which visits can be done by video or phone.
- What is John Duhn's NPI number?
- 1821043613. 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 Duhn works
Medicare's Facility Affiliation Data lists John Duhn at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Health Saint Mary'sGrand Rapids, MI · Acute Care Hospital · CCN 230059
- Spectrum HealthGrand Rapids, MI · Acute Care Hospital · CCN 230038
Group practices
Medicare enrollment lists John Duhn as a member of this group (CMS data updated 2026-10-02).
- Vpa PC178 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Grand Rapids
Clinicians with the same Medicare primary specialty in Grand Rapids, MI — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Michigan State University College Of Osteopathic Medicine |
| Graduation year | 2003 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1821043613 |
| 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