Walter Robert Mazzei Jr., MD
NPI 1083948285ActiveIndividual· Internal Medicine, Clinical Cardiac Electrophysiology· Columbia, SC
Internal Medicine, Clinical Cardiac Electrophysiology (MD) in Columbia, South Carolina, trained at Southern Illinois University School of Medicine (class of 2004). In 2024 Medicare paid $646,041 for 2,297 patients, and Part D covered 1,849 of their prescriptions, 72% of them generic. Boston Scientific Corporation was the largest of 14 companies reporting payments in 2025, $87,618 in all, mostly speaking and faculty fees.
Overview
| NPI | 1083948285 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 22, 2009 |
| Last updated in NPPES | Oct 2, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Clinical Cardiac Electrophysiology Primary | 207RC0001X | 33468 | SC |
| Internal Medicine | 207R00000X | 33468 | SC |
| Internal Medicine, Cardiovascular Disease | 207RC0000X | 33468 | SC |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Cardiac Electrophysiology (SC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 2,297 |
|---|---|
| Services billed | 11,532 across 85 procedure codes |
| Paid by Medicare | $646,041 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,849 · 4,432 30-day fills |
|---|---|
| Patients | 353 |
| Total drug cost | $578,455 |
| Generic share | 72% of claims |
Education and affiliations
| Medical school | Southern Illinois University School of Medicine |
|---|---|
| Graduation year | 2004 |
| Medicare specialty | Cardiac Electrophysiology |
| Secondary specialties | Cardiovascular Disease (Cardiology), Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Prisma Health Medical Group-MidlandsColumbia, SC · 1,068 clinicians
Hospital affiliations
- Prisma Health BaptistColumbia, SC
- Prisma Health Baptist ParkridgeColumbia, SC
- Prisma Health Richland HospitalColumbia, SC
- Prisma Health Tuomey HospitalSumter, SC
Industry payments (Open Payments)
- 2025$87,618 · 128 payments from 14 companies
- 2024$1,786 · 94 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boston Scientific Corporation | $85,996 | 75 |
| Medtronic, Inc. | $879.08 | 17 |
| Atricure, Inc. | $191.46 | 8 |
| Philips North America LLC | $131.34 | 5 |
| E.R. Squibb & Sons, L.L.C. | $97.51 | 6 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$85,625 · 47 payments
- Food and Beverage$1,993 · 81 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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