Quick answers
- Which hospitals does Margret A. Duncan work at?
- Medicare's official clinician data lists Margret A. Duncan at 2 hospitals: Holland Hospital and Spectrum Health. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Margret A. Duncan see patients?
- Medicare's clinician data lists 1 practice location in Holland, MI. Call before your visit to confirm the address.
- What is Margret A. Duncan's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Margret A. Duncan accept Medicare assignment?
- Yes. Medicare's clinician data says Margret A. Duncan 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 Margret A. Duncan?
- (616) 394-3788, as listed in official Medicare / NPI Registry data.
- What is Margret A. Duncan's NPI number?
- 1114940434. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Margret A. Duncan works
Medicare's Facility Affiliation Data lists Margret A. Duncan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Holland HospitalHolland, MI · Acute Care Hospital · CCN 230072
- Spectrum HealthGrand Rapids, MI · Acute Care Hospital · CCN 230038
Practice locations
Addresses where Margret A. Duncan is enrolled with Medicare (CMS data updated 2026-10-02).
- 336 S River AveHolland, MI 49423 (616) 394‑3788
Group practices
Medicare enrollment lists Margret A. Duncan as a member of this group (CMS data updated 2026-10-02).
- Holland Community Health Center5 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Holland
Clinicians with the same Medicare primary specialty in Holland, MI — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Wayne State University School Of Medicine |
| Graduation year | 1997 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1114940434 |
| 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