Benjamin Zwierzchowski, MD, MS
NPI 1811494842 · Internal Medicine Physician · Williamsville, NY
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Benjamin Zwierzchowski, MD, MS is a Internal Medicine Physician provider in Williamsville, NY (NPI 1811494842).
Provider details
- NPI number
- 1811494842
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, MS
- Sex
- Male
- Sole proprietor
- No
- License
- 306710 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
8 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
728 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 120 | $15 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 96 | $120 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 75 | $10 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 69 | $86 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 55 | $13 |
| Hemoglobin A1c Level83036 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 143 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 547 | 167 |
| Atorvastatin Calcium | 422 | 125 |
| Levothyroxine Sodium | 284 | 75 |
| Amlodipine Besylate | 241 | 81 |
| Lisinopril | 234 | 74 |
| Metformin Hcl | 193 | 66 |
| Metoprolol Succinate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$177 across 9 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-04-06
- Last updated
- 2021-12-20
- Certified
- 2021-12-20
Frequently asked questions
- What is Benjamin Zwierzchowski's NPI number?
- Benjamin Zwierzchowski's National Provider Identifier (NPI) is 1811494842, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Benjamin Zwierzchowski's specialty?
- Benjamin Zwierzchowski is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Benjamin Zwierzchowski located?
- Benjamin Zwierzchowski's practice location on file with NPPES is 325 Essjay, Williamsville, NY 14221-1422.
- What is Benjamin Zwierzchowski's phone number?
- The practice phone number listed in the NPPES registry for Benjamin Zwierzchowski is (716) 656-4459.
- Does Benjamin Zwierzchowski accept Medicare?
- Benjamin Zwierzchowski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Benjamin Zwierzchowski's NPI active?
- Yes — Benjamin Zwierzchowski's NPI (1811494842) 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.