Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Walter Robert Mazzei Jr., MD

Individual provider Internal Medicine Physician · NPI 1083948285

Dr. Walter Robert Mazzei Jr., MD practises Cardiac Electrophysiology in Columbia, South Carolina. Graduated from Southern Illinois University School of Medicine in 2004, 22 years ago. Practices with Prisma Health Medical Group-Midlands, a 1,018-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in South Carolina.

Years since qualifying
22
Trained at
Southern Illinois University School of Medicine
Licensed in
SC
In the registry since
2009
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

8 Richland Medical Park Dr Ste 300
Columbia, SC 29203-8005
Phone: (803) 256-6511
Fax: (803) 744-4731
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1017 Professional Ct, Manning, SC 29102-2827 — (803) 256-6511

Specialties & licences

Clinical Cardiac Electrophysiology Physician (primary) Taxonomy 207RC0001X · Licence 33468 (SC)
Internal Medicine Physician Taxonomy 207R00000X · Licence 33468 (SC)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence 33468 (SC)

Record details

NPI number1083948285
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 22, 2009
Last updated in NPPESOctober 2, 2019

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCARDIAC ELECTROPHYSIOLOGY
Also practisesCARDIOVASCULAR DISEASE (CARDIOLOGY), INTERNAL MEDICINE
Medical schoolSOUTHERN ILLINOIS UNIVERSITY SCHOOL OF MEDICINE
Graduated 2004 (22 years in practice)
Group practice Prisma Health Medical Group-Midlands — 1018 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Pacemaker insertion or repair 99 times · 98th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients2,297
Services billed 11,532 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

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 · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Prisma Health Tuomey Hospital Hospital · Sumter, SC · listed as Prisma Health Tuomey
  • Prisma Health Baptist Hospital · Columbia, SC
  • Prisma Health Baptist Parkridge Hospital · Columbia, SC
  • Prisma Health Richland Hospital Hospital · Columbia, SC

Colleagues at Prisma Health Medical Group-Midlands

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1018 clinicians in the practice; 12 are shown here.

Other providers in Columbia