Quick answers
- Does William M. Peterson Ii accept Medicare assignment?
- Yes. Medicare's clinician data says William M. Peterson Ii 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 William M. Peterson Ii see?
- In 2024, CMS data shows 2,112 Original Medicare patients and 3,845 services for William M. Peterson Ii. This counts Original Medicare only and measures volume, not quality.
- What is William M. Peterson Ii's NPI number?
- 1235366733. 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 William M. Peterson Ii, 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 | 2,112 |
|---|---|
| Services billed to Medicare | 3,845 |
| Different services or procedures | 110 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Ct scan of upper spine without contrast (72125)249 services
- X-ray of hip, 2-3 views (73502)205 services
- X-ray of foot, minimum of 3 views (73630)186 services
- X-ray of knee, 1-2 views (73560)171 services
- X-ray of lower and sacral spine, 2-3 views (72100)165 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 blood pressure75%
- High cholesterol75%
- Arthritis73%
- Anxiety34%
- Diabetes32%
- Ischemic heart disease31%
Hospitals where William M. Peterson Ii works
Medicare's Facility Affiliation Data lists William M. Peterson Ii 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.
- Ahn Wexford HospitalWexford, PA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 390334
- Allegheny General HospitalPittsburgh, PA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 390050
- Forbes HospitalMonroeville, PA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 390267
- Grove City Medical CenterGrove City, PA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 390266
- Saint Vincent HospitalErie, PA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 390009
Practice locations
Addresses where William M. Peterson Ii is enrolled with Medicare (CMS data updated October 2, 2026).
- 189 E Main StWestfield, NY 14787 (716) 793‑2221
- 320 E N AvePittsburgh, PA 15212 (412) 359‑2459
Group practices
Medicare enrollment lists William M. Peterson Ii as a member of these groups (CMS data updated October 2, 2026).
- Allegheny Clinic Radiology152 clinicians in the group
- Chautauqua Medical Practice PC107 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Westfield
Clinicians with the same Medicare primary specialty in Westfield, NY — not a recommendation.
Other clinicians in Allegheny Clinic Radiology
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Pennsylvania State University College Of Medicine |
| Graduation year | 2008 (18 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1235366733 |
| 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