Quick answers
- Does Robert Zielinski accept Medicare assignment?
- Yes. Medicare's clinician data says Robert Zielinski 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 Robert Zielinski see?
- In 2024, CMS data shows 426 Original Medicare patients and 132,609 services for Robert Zielinski. This counts Original Medicare only and measures volume, not quality.
- What is Robert Zielinski's NPI number?
- 1043260664. 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 Robert Zielinski, 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 | 426 |
|---|---|
| Services billed to Medicare | 132,609 |
| Different services or procedures | 122 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Injection, ferric carboxymaltose, 1 mg (J1439)54,000 services
- Injection, denosumab, 1 mg (J0897)5,160 services
- Injection, dexamethasone sodium phosphate, 1 mg (J1100)894 services
- Infusion, normal saline solution, 250 cc (J7050)673 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)343 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%
- Arthritis49%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)48%
- Chronic kidney disease37%
- Ischemic heart disease32%
Hospitals where Robert Zielinski works
Medicare's Facility Affiliation Data lists Robert Zielinski 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
- Kenmore Mercy HospitalKenmore, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330102
- Medina Memorial HospitalMedina, NY · Critical Access Hospital · Emergency services: listed by Medicare · CCN 331319
- Mount St. Mary's Hospital & Health CenterLewiston, NY · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 330188
- Sisters of Charity HospitalBuffalo, NY · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 330078
Practice locations
Addresses where Robert Zielinski is enrolled with Medicare (CMS data updated October 2, 2026).
- 2157 Main StBuffalo, NY 14214 (716) 862‑1000
- 85 High StBuffalo, NY 14203 (716) 630‑1000
Group practices
Medicare enrollment lists Robert Zielinski as a member of these groups (CMS data updated October 2, 2026).
- Buffalo Medical Group, P.C.236 clinicians in the group
- Sisters of Charity Hospital of Buffalo New York164 clinicians in the group
Specialties
- Hematologyprimary
- Medical Oncologyalso
Other hematologists in Buffalo
Clinicians with the same Medicare primary specialty in Buffalo, 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 | MD |
|---|---|
| Medical school | State University Of Ny Upstate Medical University |
| Graduation year | 1985 (41 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) | 1043260664 |
| 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