Quick answers
- Does Mihai Merzianu accept Medicare assignment?
- Yes. Medicare's clinician data says Mihai Merzianu 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 Mihai Merzianu see?
- In 2024, CMS data shows 174 Original Medicare patients and 881 services for Mihai Merzianu. This counts Original Medicare only and measures volume, not quality.
- What is Mihai Merzianu's NPI number?
- 1245221001. 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 Mihai Merzianu, 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 | 174 |
|---|---|
| Services billed to Medicare | 881 |
| Different services or procedures | 26 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Special stained specimen slides to examine tissue, each additional procedure (88341)270 services
- Pathology examination of tissue using a microscope, intermediate complexity (88305)158 services
- Flow cytometry technique for dna or cell analysis, 16 or more markers (88189)65 services
- Special stained specimen slides to examine tissue, initial procedure (88342)61 services
- Bone marrow, smear interpretation (85097)49 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%
- Arthritis41%
- Chronic kidney disease37%
- Diabetes30%
- Ischemic heart disease25%
Practice locations
Addresses where Mihai Merzianu is enrolled with Medicare (CMS data updated October 2, 2026).
- 1540 Maple RdWilliamsville, NY 14221 (716) 845‑2300
- Elm and Carlton StBuffalo, NY 14263 (716) 845‑2300
Group practices
Medicare enrollment lists Mihai Merzianu as a member of this group (CMS data updated October 2, 2026).
- Roswell Park Cancer Institute488 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Williamsville
Clinicians with the same Medicare primary specialty in Williamsville, NY — not a recommendation.
Other clinicians in Roswell Park Cancer Institute
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1995 (31 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1245221001 |
| 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