Martyn Knowles, MD
NPI 1265632731ActiveIndividual· Surgery· Raleigh, NC
Surgery (MD) with North Carolina Mg LLC and 1 other group, practicing in Raleigh, North Carolina. In 2024 Medicare paid $198,611 for 687 patients, and Part D covered 367 of their prescriptions, 59% of them generic. Penumbra, Inc. was the largest of 9 companies reporting payments in 2025, $89,882 in all, mostly speaking and faculty fees. Lists Rex Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1265632731 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 23, 2007 |
| Last updated in NPPES | Apr 1, 2021 |
| Certified by provider | Apr 1, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | 2015-00304 | NC |
| Surgery, Vascular Surgery | 2086S0129X | 2015-00304 | 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 - Vascular Surgery (NC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 687 |
|---|---|
| Services billed | 1,869 across 122 procedure codes |
| Paid by Medicare | $198,611 |
Part D prescriptions in 2024
| Prescriptions (claims) | 367 · 698 30-day fills |
|---|---|
| Patients | 121 |
| Total drug cost | $138,460 |
| Generic share | 59% of claims |
Education and affiliations
| Graduation year | 2007 |
|---|---|
| Medicare specialty | Vascular Surgery |
| Secondary specialties | General Surgery |
| Telehealth | Offers telehealth |
Medical groups
- North Carolina Mg LLCRaleigh, NC · 751 clinicians
- North Carolina Nephrology PASmithfield, NC · 58 clinicians
Hospital affiliations
- Rex HospitalRaleigh, NC
- Unc HospitalsChapel Hill, NC
Industry payments (Open Payments)
- 2025$89,882 · 76 payments from 9 companies
- 2024$60,682 · 51 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Penumbra, Inc. | $87,803 | 68 |
| Cordis US Corp. | $1,500 | 1 |
| Contego Medical, Inc | $225.00 | 1 |
| W. L. Gore & Associates, Inc. | $134.87 | 1 |
| Endologix LLC | $128.27 | 1 |
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$54,483 · 12 payments
- Travel and Lodging$31,049 · 41 payments
- Food and Beverage$2,849 · 22 payments
- Consulting Fee$1,500 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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