William Carl Mostertz III, MD
NPI 1679928022ActiveIndividual· Internal Medicine, Advanced Heart Failure and Transplant Cardiology· Chapel Hill, NC
Internal Medicine, Advanced Heart Failure and Transplant Cardiology (MD) in Chapel Hill, North Carolina, trained at Medical University of South Carolina College of Medicine (class of 2016). Their prescriptions cost Medicare Part D more than their services did: $1,407,252 for 1,180 claims, against $62,685 paid for services in 2024. Abbott Laboratories was the largest of 9 companies reporting payments in 2025, $1,268 in all, mostly food and beverage.
Overview
| NPI | 1679928022 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 3, 2016 |
| Last updated in NPPES | Aug 31, 2023 |
| Certified by provider | Aug 31, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Advanced Heart Failure and Transplant Cardiology Primary | 207RA0001X | 2022-01919 | NC |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Advanced Heart Failure and Transplant Cardiology (NC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 149 |
|---|---|
| Services billed | 671 across 20 procedure codes |
| Paid by Medicare | $62,685 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,180 · 2,112 30-day fills |
|---|---|
| Patients | 181 |
| Total drug cost | $1,407,252 |
| Generic share | 71% of claims |
Education and affiliations
| Medical school | Medical University of South Carolina College of Medicine |
|---|---|
| Graduation year | 2016 |
| Medicare specialty | Advanced Heart Failure And Transplant Cardiology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- University of North Carolina at Chapel HillChapel Hill, NC · 2,052 clinicians
- Nhcs Physicians IncRocky Mount, NC · 97 clinicians
Hospital affiliations
- Cape Fear Valley Medical CenterFayetteville, NC
- Firsthealth Moore Regional HospitalPinehurst, NC
- Southeastern Regional Medical CenterLumberton, NC
- Unc Health NashRocky Mount, NC
- Unc HospitalsChapel Hill, NC
Industry payments (Open Payments)
- 2025$1,268 · 24 payments from 9 companies
- 2024$474.06 · 10 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbott Laboratories | $434.22 | 7 |
| Cvrx, Inc. | $379.42 | 6 |
| Alnylam Pharmaceuticals Inc. | $188.41 | 4 |
| Abiomed | $136.01 | 1 |
| Bridgebio Pharma, Inc. | $43.43 | 2 |
What the 2025 payments were for
- Food and Beverage$1,268 · 24 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Advanced Heart Failure and Transplant Cardiology providers in Chapel Hill
- 1326118068
- 1639231392
- 1306012091