Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Sergio G Demier, DO

Individual provider Family Medicine Physician · NPI 1558422337

Dr. Sergio G Demier, DO is registered under Family Practice in Seminole, Oklahoma. Graduated from Oklahoma State University College of Osteopathic Medicine in 1993, 33 years ago. Practices with Cimarron Memorial Hospital and Nursing Home, a 7-clinician group and accepts Medicare assignment. Licensed in Oklahoma.

Years since qualifying
33
Trained at
Oklahoma State University College of Osteopathic Medicine
Licensed in
OK
In the registry since
2006
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

2403 W Wrangler Blvd Ste A
Seminole, OK 74868-1900 Not confirmed with CMS for 19 years — call before visiting
Phone: (405) 382-4939
Fax: (405) 382-4947
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 3350 (OK)

Record details

NPI number1558422337
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedDecember 13, 2006
Last updated in NPPESJuly 8, 2007

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Also practisesEMERGENCY MEDICINE
Medical schoolOKLAHOMA STATE UNIVERSITY COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 1993 (33 years in practice)
Group practice Cimarron Memorial Hospital And Nursing Home — 7 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients199
Services billed 484 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Also affiliated with 1 nursing home, which CMS identifies by certification number only.

Colleagues at Cimarron Memorial Hospital and Nursing Home

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 7 clinicians in the practice; 5 are shown here.

Other providers in Seminole