Quick answers
- Which hospitals does Nicholas O'Neill work at?
- Medicare's official clinician data lists Nicholas O'Neill at 5 hospitals: Essentia Health, Essentia Health Ada, Essentia Health Fosston, Essentia Health Holy Trinity Hospital and Essentia Health St Marys - Detroit Lakes. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Nicholas O'Neill see patients?
- Medicare's clinician data lists 2 practice locations, including Fargo, ND and Fosston, MN. Call before your visit to confirm the address.
- What is Nicholas O'Neill's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty.
- Does Nicholas O'Neill accept Medicare assignment?
- Yes. Medicare's clinician data says Nicholas 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 Nicholas O'Neill?
- (701) 364-8000, as listed in official Medicare / NPI Registry data.
- What is Nicholas O'Neill's NPI number?
- 1437509387. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Nicholas O'Neill works
Medicare's Facility Affiliation Data lists Nicholas O'Neill at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Essentia HealthFargo, ND · Acute Care Hospital · CCN 350070
- Essentia Health AdaAda, MN · Critical Access Hospital · CCN 241313
- Essentia Health FosstonFosston, MN · Critical Access Hospital · CCN 241357
- Essentia Health Holy Trinity HospitalGraceville, MN · Critical Access Hospital · CCN 241321
- Essentia Health St Marys - Detroit LakesDetroit Lakes, MN · Acute Care Hospital · CCN 240101
Practice locations
Addresses where Nicholas O'Neill is enrolled with Medicare (CMS data updated 2026-10-02).
- 3000 32nd Ave SFargo, ND 58103 (701) 364‑8000
- 900 Hilligoss Blvd SEFosston, MN 56542 (218) 435‑1133
Group practices
Medicare enrollment lists Nicholas O'Neill as a member of these groups (CMS data updated 2026-10-02).
- Innovis Health LLC559 clinicians in the group
- First Care Medical Services19 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Fargo
Clinicians with the same Medicare primary specialty in Fargo, ND — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2016 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1437509387 |
| 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