Quick answers
- Which hospitals does Sean O'Neill work at?
- Medicare's official clinician data lists Sean O'Neill at 2 hospitals: Beebe Medical Center and Holland Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Sean O'Neill see patients?
- Medicare's clinician data lists 1 practice location in Holland, MI. Call before your visit to confirm the address.
- What is Sean O'Neill's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Sean O'Neill accept Medicare assignment?
- Yes. Medicare's clinician data says Sean O'Neill 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 Sean O'Neill?
- (616) 392-8035, as listed in official Medicare / NPI Registry data.
- What is Sean O'Neill's NPI number?
- 1336707918. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Sean O'Neill works
Medicare's Facility Affiliation Data lists Sean O'Neill at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Beebe Medical CenterLewes, DE · Acute Care Hospital · CCN 080007
- Holland HospitalHolland, MI · Acute Care Hospital · CCN 230072
Practice locations
Addresses where Sean O'Neill is enrolled with Medicare (CMS data updated 2026-10-02).
- 904 Washington Ave, 210 Family Medicine South WashingtonHolland, MI 49423 (616) 392‑8035
Group practices
Medicare enrollment lists Sean O'Neill as a member of this group (CMS data updated 2026-10-02).
- Holland Community Hospital178 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 |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336707918 |
| 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