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

William Joseph Mazzella, MD

Individual provider Hospitalist Physician · NPI 1528158227

William Joseph Mazzella, MD is a Hospitalist in Greenville, South Carolina. Graduated from University of North Carolina at Chapel Hill School of Medicine in 1998, 28 years ago. Practices with Prisma Health University Medical Group, a 2,446-clinician group, works from 7 locations and accepts Medicare assignment. Licensed in Colorado, Indiana, Kentucky and Louisiana and 2 more.

Years since qualifying
28
Trained at
University of North Carolina at Chapel Hill School of Medicine
Licensed in
CO, IN, KY, LA, NC, SC
In the registry since
2006
Specialties on file
7
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

701 Grove Rd Fl 5
Greenville, SC 29605-4210
Phone: (864) 455-4411
Fax: (864) 455-4480
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (6)

  • 11109 Parkview Plaza Dr, Fort Wayne, IN 46845-1701 — (260) 266-2020
  • 5000 Hennessy Blvd, Baton Rouge, LA 70808-4375 — (225) 765-5864
  • 7777 Hennessy Blvd Ste 701, Baton Rouge, LA 70808-4370 — (225) 765-5864
  • 309 Jackson St, Monroe, LA 71201-7407 — (318) 966-4541
  • 19 Maxwell Rd, Chapel Hill, NC 27517-4043 — (704) 709-9362
  • 601 N Elm St, High Point, NC 27262-4331 — (336) 716-2255

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 35221 (SC)
Hospitalist Physician Taxonomy 208M00000X · Licence 200101093 (NC)
Hospitalist Physician Taxonomy 208M00000X · Licence 44676 (KY)
Hospitalist Physician Taxonomy 208M00000X · Licence DR0051332 (CO)
Internal Medicine Physician Taxonomy 207R00000X · Licence 311477 (LA)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence 200101093 (NC)
Internal Medicine Physician Taxonomy 207R00000X · Licence CV2005119 (IN)

Record details

NPI number1528158227
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 13, 2006
Last updated in NPPESJanuary 31, 2023
Certification dateJanuary 31, 2023

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Medical schoolUNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL SCHOOL OF MEDICINE
Graduated 1998 (28 years in practice)
Group practice Prisma Health University Medical Group — 2446 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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