John C. Parker, M.D.
NPI 1457345928ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Wilmington, NC
Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) in Wilmington, North Carolina, trained at University of North Carolina at Chapel Hill School of Medicine (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $3,250,800 for 5,729 claims, against $397,244 paid for services in 2024. Corcept Therapeutics was the largest of 30 companies reporting payments in 2025, $70,400 in all, mostly speaking and faculty fees.
Overview
| NPI | 1457345928 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 9, 2005 |
| Last updated in NPPES | Feb 8, 2021 |
| Certified by provider | Feb 8, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | 200100175 | NC |
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 - Endocrinology (NC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 958 |
|---|---|
| Services billed | 29,135 across 69 procedure codes |
| Paid by Medicare | $397,244 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,729 · 13,531 30-day fills |
|---|---|
| Patients | 1,001 |
| Total drug cost | $3,250,800 |
| Generic share | 49% of claims |
Education and affiliations
| Medical school | University of North Carolina at Chapel Hill School of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Endocrinology |
| Telehealth | Offers telehealth |
Medical groups
- Wilmington Health PLLCWilmington, NC · 369 clinicians
- Raleigh Medical Group PAWake Forest, NC · 102 clinicians
Hospital affiliations
- Columbus Regional Healthcare SystemWhiteville, NC
- J Arthur Dosher Memorial HospitalSouthport, NC
- Novant Health New Hanover Regional Medical CenterWilmington, NC
Industry payments (Open Payments)
- 2025$70,400 · 175 payments from 30 companies
- 2024$33,806 · 166 payments from 26 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Corcept Therapeutics | $42,145 | 38 |
| Insulet Corporation | $13,692 | 21 |
| Novo Nordisk Inc | $12,803 | 25 |
| Lilly USA, LLC | $281.91 | 16 |
| Antares Pharma, Inc. | $187.94 | 8 |
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$49,865 · 24 payments
- Honoraria$9,448 · 4 payments
- Consulting Fee$5,568 · 3 payments
- Food and Beverage$3,474 · 135 payments
- Travel and Lodging$2,045 · 9 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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