Quick answers
- Does Andrew W. Halsdorfer accept Medicare assignment?
- Yes. Medicare's clinician data says Andrew W. Halsdorfer 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 Andrew W. Halsdorfer see?
- In 2024, CMS data shows 104 Original Medicare patients and 1,004 services for Andrew W. Halsdorfer. This counts Original Medicare only and measures volume, not quality.
- What is Andrew W. Halsdorfer's NPI number?
- 1376500157. 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 Andrew W. Halsdorfer, 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 | 104 |
|---|---|
| Services billed to Medicare | 1,004 |
| Different services or procedures | 53 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Blood test, lipids (cholesterol and triglycerides) (80061)87 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)86 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)80 services
- Blood test, comprehensive group of blood chemicals (80053)77 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)72 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%
- High blood pressure72%
- Arthritis38%
- Ischemic heart disease32%
- Anxiety25%
- Chronic kidney disease24%
Practice locations
Addresses where Andrew W. Halsdorfer is enrolled with Medicare (CMS data updated October 2, 2026).
- 325 Essjay RdWilliamsville, NY 14221 (716) 630‑1000
Group practices
Medicare enrollment lists Andrew W. Halsdorfer as a member of this group (CMS data updated October 2, 2026).
- Buffalo Medical Group, P.C.236 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Williamsville
Clinicians with the same Medicare primary specialty in Williamsville, NY — not a recommendation.
Other clinicians in Buffalo Medical Group, P.C.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | New York College Of Osteo Medicine Of New York Institute Of Technology |
| Graduation year | 1999 (27 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1376500157 |
| 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
- 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