Robert Zielinski, MD
NPI 1043260664 · Hematology & Oncology Physician · Williamsville, NY
Enrolled with Medicare as Practitioner - Hematology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Zielinski, MD is a Hematology & Oncology Physician provider in Williamsville, NY (NPI 1043260664).
Provider details
- NPI number
- 1043260664
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 168200-1 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,690 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| 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'SG2211 | 343 | $16 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 326 | $87 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 299 | $8 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 247 | $7 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 205 | $59 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 386 | 89 |
| Hydroxyurea | 197 | 36 |
| Ibrutinibbrand: Imbruvica | 124 | 13 |
| Exemestane | 59 | 11 |
| Prednisone | 57 | 21 |
| Prochlorperazine Maleate | 50 | 38 |
| Dexamethasone | 45 | 13 |
| Hydrocodone/Acetaminophen |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-12
- Last updated
- 2021-12-20
- Certified
- 2021-12-20
Frequently asked questions
- What is Robert Zielinski's NPI number?
- Robert Zielinski's National Provider Identifier (NPI) is 1043260664, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Zielinski's specialty?
- Robert Zielinski is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Zielinski located?
- Robert Zielinski's practice location on file with NPPES is 295 Essjay Rd, Williamsville, NY 14221-8216.
- What is Robert Zielinski's phone number?
- The practice phone number listed in the NPPES registry for Robert Zielinski is (716) 630-1059.
- Does Robert Zielinski accept Medicare?
- Robert Zielinski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Zielinski's NPI active?
- Yes — Robert Zielinski's NPI (1043260664) is active in the NPPES registry as of the last update on 2021-12-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.