Quick answers
- Does Ariana M. Demers accept Medicare assignment?
- Yes. Medicare's clinician data says Ariana M. Demers accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Ariana M. Demers see?
- In 2024, CMS data shows 511 Original Medicare patients and 10,260 services for Ariana M. Demers. This counts Original Medicare only and measures volume, not quality.
- What is Ariana M. Demers's NPI number?
- 1477676047. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Ariana M. Demers, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 511 |
|---|---|
| Services billed to Medicare | 10,260 |
| Different services or procedures | 55 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Hyaluronan or derivative, durolane, for intra-articular injection, 1 mg (J7318)8,222 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)867 services
- Aspiration and/or injection of fluid large joint using ultrasound guidance (20611)368 services
- Hyaluronan or derivative, monovisc, for intra-articular injection, per dose (J7327)147 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)137 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- Arthritis75%
- High cholesterol73%
- High blood pressure67%
- Anxiety21%
- Diabetes16%
- Depression16%
Hospitals where Ariana M. Demers works
Medicare's Facility Affiliation Data lists Ariana M. Demers at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Adventist Health SonoraSonora, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050335
- Mark Twain Medical CenterSan Andreas, CA · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 051332
Practice locations
Addresses where Ariana M. Demers is enrolled with Medicare (CMS data updated October 2, 2026).
- 13949 Mono WaySonora, CA 95370 (209) 533‑5371
Group practices
Medicare enrollment lists Ariana M. Demers as a member of this group (CMS data updated October 2, 2026).
- Sierra Orthopedic Institute Medical Corporation3 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
- Sports Medicinealso
Other orthopedic surgeons in Sonora
Clinicians with the same Medicare primary specialty in Sonora, CA — not a recommendation.
Other clinicians in Sierra Orthopedic Institute Medical Corporation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2003 (23 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1477676047 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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