Quick answers
- Which hospitals does Sergio G. Demier work at?
- Medicare's official clinician data lists Sergio G. Demier at 4 hospitals: Arbuckle Memorial Hospital Authority, Cimarron Memorial Hospital, Memorial Hospital of Texas County Authority and Newman Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Sergio G. Demier see patients?
- Medicare's clinician data lists 5 practice locations, including Boise City, OK, Sulphur, OK and Guymon, OK. Call before your visit to confirm the address.
- What is Sergio G. Demier's specialty?
- Medicare lists Family Practice as the primary specialty, and also Emergency Medicine.
- Does Sergio G. Demier accept Medicare assignment?
- Yes. Medicare's clinician data says Sergio G. Demier 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 Sergio G. Demier?
- (580) 622-2161, as listed in official Medicare / NPI Registry data.
- What is Sergio G. Demier's NPI number?
- 1558422337. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Sergio G. Demier works
Medicare's Facility Affiliation Data lists Sergio G. Demier at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Arbuckle Memorial Hospital AuthoritySulphur, OK · Critical Access Hospital · CCN 371328
- Cimarron Memorial HospitalBoise City, OK · Critical Access Hospital · CCN 371307
- Memorial Hospital of Texas County AuthorityGuymon, OK · Critical Access Hospital · CCN 371340
- Newman Memorial HospitalShattuck, OK · Critical Access Hospital · CCN 371336
Practice locations
Addresses where Sergio G. Demier is enrolled with Medicare (CMS data updated 2026-10-02).
- 102 S EllisBoise City, OK 73933
- 2011 W Broadway AveSulphur, OK 73086 (580) 622‑2161
- 520 Medical DrGuymon, OK 73942 (580) 338‑6515
- 905 S MainShattuck, OK 73858
- 905 S Main StShattuck, OK 73858 (580) 938‑2551
Group practices
Medicare enrollment lists Sergio G. Demier as a member of these groups (CMS data updated 2026-10-02).
- Newman Memorial Hospital, Inc33 clinicians in the group
- Arbuckle Memorial Hospital9 clinicians in the group
- Memorial Hospital of Texas County Authority9 clinicians in the group
- Cimarron Memorial Hospital and Nursing Home7 clinicians in the group
Specialties
- Family Practiceprimary
- Emergency Medicinealso
Other family doctors in Oklahoma
Clinicians with the same Medicare primary specialty in Oklahoma — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Oklahoma State University College Of Osteopathic Medicine |
| Graduation year | 1993 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1558422337 |
| 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