Quick answers
- Does Mason S. Stilwell accept Medicare assignment?
- Yes. Medicare's clinician data says Mason S. Stilwell 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 Mason S. Stilwell see?
- In 2024, CMS data shows 447 Original Medicare patients and 8,618 services for Mason S. Stilwell. This counts Original Medicare only and measures volume, not quality.
- What is Mason S. Stilwell's NPI number?
- 1275797060. 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 Mason S. Stilwell, 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 | 447 |
|---|---|
| Services billed to Medicare | 8,618 |
| Different services or procedures | 41 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Injection, methylprednisolone acetate, 1 mg (J1010)7,640 services
- Aspiration and/or injection of fluid from large joint (20610)145 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)129 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)105 services
- Replacement of knee joint, both sides of knee (27447)96 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).
- High cholesterol75%
- Arthritis75%
- High blood pressure74%
- Diabetes27%
- Ischemic heart disease24%
- Anxiety22%
Hospitals where Mason S. Stilwell works
Medicare's Facility Affiliation Data lists Mason S. Stilwell 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.
- Guthrie Cortland Regional Medical CenterCortland, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330175
- Our Lady of Lourdes Memorial Hospital, IncBinghamton, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330011
- Robert Packer HospitalSayre, PA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 390079
Practice locations
Addresses where Mason S. Stilwell is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.
- 1 Guthrie SqSayre, PA 18840
- 130 Ctr WayCorning, NY 14830 (607) 936‑9971
- 2000 Westinghouse DrCranberry Township, PA 16066
- 2000 Westinghouse Dr, Suite 200Cranberry Twp, PA 16066
- 720 Willow AveIthaca, NY 14850 (607) 219‑4600
Group practices
Medicare enrollment lists Mason S. Stilwell as a member of these groups (CMS data updated October 2, 2026).
- Phoenix Rehabilitation and Health Services Inc2,800 clinicians in the group
- Guthrie Medical Group PC795 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Sayre
Clinicians with the same Medicare primary specialty in Sayre, PA — not a recommendation.
Other clinicians in Phoenix Rehabilitation and Health Services Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2005 (21 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1275797060 |
| 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