Martyn Knowles, MD
NPI 1265632731 · Surgery Physician · Raleigh, NC
Martyn Knowles, MD is a Surgery Physician provider in Raleigh, NC (NPI 1265632731).
Provider details
- NPI number
- 1265632731
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 2015-00304 (NC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,532 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 228 | $119 |
| Ultrasound Study of Arm and Leg Arteries93922 | 170 | $62 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 124 | $104 |
| Ultrasound of Both Sides of Head and Neck Blood Flow93880 | 93 | $173 |
| Ultrasound Study of One Arm Or Leg Veins With Compression and Maneuvers93971 | 83 | $107 |
| Ultrasound Study of Arm Or Leg Veins With Compression and Maneuvers93970 | 76 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$60,682 across 51 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-07-23
- Last updated
- 2021-04-01
- Certified
- 2021-04-01
Frequently asked questions
- What is Martyn Knowles's NPI number?
- Martyn Knowles's National Provider Identifier (NPI) is 1265632731, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Martyn Knowles's specialty?
- Martyn Knowles is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Martyn Knowles located?
- Martyn Knowles's practice location on file with NPPES is 4414 Lake Boone Trl, Raleigh, NC 27607-7513.
- What is Martyn Knowles's phone number?
- The practice phone number listed in the NPPES registry for Martyn Knowles is (919) 397-9772.
- Is Martyn Knowles's NPI active?
- Yes — Martyn Knowles's NPI (1265632731) is active in the NPPES registry as of the last update on 2021-04-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.