Quick answers
- Does Donald J. Nenno accept Medicare assignment?
- Yes. Medicare's clinician data says Donald J. Nenno 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 Donald J. Nenno see?
- In 2024, CMS data shows 106 Original Medicare patients and 1,383 services for Donald J. Nenno. This counts Original Medicare only and measures volume, not quality.
- What is Donald J. Nenno's NPI number?
- 1154387868. 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 Donald J. Nenno, 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 | 106 |
|---|---|
| Services billed to Medicare | 1,383 |
| Different services or procedures | 32 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)94 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)50 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)16 services
- Treatment of upper end of broken thigh bone with placement of stabilizing device or prosthetic replacement (27236)14 services
- Treatment of broken neck of thigh bone with bone implant (27245)13 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%
- Arthritis67%
- Anxiety45%
- Depression38%
- Chronic kidney disease37%
Hospitals where Donald J. Nenno works
Medicare's Facility Affiliation Data lists Donald J. Nenno 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.
- Kaleida HealthBuffalo, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330005
- Niagara Falls Memorial Medical CenterNiagara Falls, NY · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 330065
Practice locations
Addresses where Donald J. Nenno is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.
- 100 High StBuffalo, NY 14203 (716) 859‑5600
- 1540 Maple RdWilliamsville, NY 14221 (716) 568‑3600
- 415 Tremont StNorth Tonawanda, NY 14120 (716) 833‑4201
- 445 Tremont StNorth Tonawanda, NY 14120 (716) 694‑4500
- 445 Tremont St, Box 0705N Tonawanda, NY 14120 (716) 694‑4500
Group practices
Medicare enrollment lists Donald J. Nenno as a member of this group (CMS data updated October 2, 2026).
- Kaleida Health236 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Buffalo
Clinicians with the same Medicare primary specialty in Buffalo, NY — not a recommendation.
Other clinicians in Kaleida Health
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1975 (51 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1154387868 |
| 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