MARTYN KNOWLES MD
NPI 1265632731
Surgery in Raleigh, NC

Q: What is Martyn Knowles's NPI number?

The NPI number for Martyn Knowles is 1265632731. It was assigned to this individual provider in the NPPES registry on July 23, 2007.

Q: What is Martyn Knowles's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Q: When was this NPI record last updated?

The NPPES record for Martyn Knowles was last updated on April 1, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since July 23, 2007PECOS EnrolledAccepts Medicare Assignment

4414 LAKE BOONE TRL, SUITE 108, RALEIGH, NC 27607(919) 397-9772 Get Directions Write a Review

NPPES record last updated: April 1, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 1, 2021, Mar 20, 2020 (2 updates tracked since 2020).

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About Martyn Knowles Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARTYN KNOWLES MD (NPI 1265632731) is an individual surgery provider in Raleigh, North Carolina, licensed in North Carolina (2015-00304) and active in the NPI registry since July 2007. He is enrolled in Medicare PECOS, is affiliated with Unc Hospitals, and is a graduate of Other (2007).

NPPES Registry Identity

NPI1265632731

Entity TypeIndividualMale

Primary Taxonomy208600000X

Provider Legal NameMARTYN KNOWLESCredential: MD

Location Address4414 LAKE BOONE TRL, SUITE 108Raleigh, NC 27607-7513

Mailing Address4414 Lake Boone Trl, Suite 108Raleigh, NC 27607-7513

Phone(919) 397-9772

Sole ProprietorNo

Medical School CMSOtherGraduated 2007

Enumeration DateJuly 23, 2007

Last NPPES UpdateApril 1, 20212 updates tracked since enumeration

NPPES CertifiedApril 1, 2021

✔ NPI 1265632731 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208600000X

License✔ Licensed in NC · 2015-00304

Definition

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

Also ListedSurgery · Vascular SurgeryTaxonomy 2086S0129X · License 2015-00304 (NC)

4414 LAKE BOONE TRL, Raleigh, NC 27607

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include AmeriHealth Caritas Next, Blue Cross and Blue Shield of NC, UnitedHealthcare.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Martyn Knowles Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8527285428

PECOS Enrollment IDI20150709001538

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Martyn Knowles reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

North Carolina Mg, LLC

0.1 mi

Hospitalist

4420 LAKE BOONE TRL
Raleigh, NC 27607

Reassigned Medicare billing, North Carolina enrollment
701 clinicians in this Medicare group

NPI 1215741640 (919) 784-3100

North Carolina Nephrology PA

3.9 mi

Nephrology

3700 BARRETT DR STE 200
Raleigh, NC 27609

Reassigned Medicare billing, North Carolina enrollment
59 clinicians in this Medicare group

NPI 1750835336 (919) 231-3966

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 28

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

228 services187 patients

Ultrasound study of arm and leg arteries 93922

An ultrasound study of arm and leg arteries is a non-invasive procedure that uses sound waves to create images of your arteries. It helps in checking blood flow, identifying blockages, or detecting other abnormalities in your arteries.

170 services123 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

124 services124 patients

Ultrasound of both sides of head and neck blood flow 93880

An ultrasound of the head and neck blood flow is a safe, non-invasive procedure that uses sound waves to create images of blood vessels. It helps detect abnormalities like blockages or clots, ensuring optimal blood flow.

93 services83 patients

Ultrasound study of one arm or leg veins with compression and maneuvers 93971

This is a non-invasive procedure using sound waves to visualize veins in an arm or leg. It involves applying gentle pressure and performing certain movements. It helps identify any abnormal blood flow or clots, ensuring vascular health.

83 services69 patients

Ultrasound study of arm or leg veins with compression and maneuvers 93970

An ultrasound study of arm or leg veins with compression and maneuvers is a non-invasive procedure that uses sound waves to create images of your veins. This helps identify blood clots or other vein problems. During the procedure, pressure is applied to the veins and certain movements are performed to assess blood flow.

76 services73 patients

Injection of chemical agent into multiple incompetent veins of leg 36471

This procedure involves injecting a special chemical into problematic veins in the leg. The chemical helps to close off these veins, rerouting blood through healthier veins. This can alleviate discomfort and improve the appearance of the treated area.

64 services23 patients

Ultrasonic guidance for needle placement 76942

Ultrasonic guidance for needle placement is a technique where sound waves create images that help accurately position the needle during procedures. This method ensures precision, minimizes discomfort, and increases safety.

63 services23 patients

Ultrasound study of one arm or leg veins with compression and maneuvers 93971

60 services60 patients

Ultrasound of one leg arteries or artery grafts 93926

An ultrasound of leg arteries or artery grafts is a non-invasive test using sound waves to create images of your blood vessels. This helps doctors assess blood flow, identify blockages, and monitor the health of grafts.

56 services42 patients

Ultrasound of leg arteries or artery grafts 93925

An ultrasound of leg arteries or artery grafts is a non-invasive imaging test. It uses high-frequency sound waves to capture live images from inside your body, specifically your leg arteries or grafts. This helps in detecting any blockages or abnormalities.

55 services47 patients

Ultrasound study of arm or leg veins with compression and maneuvers 93970

47 services47 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

47 services47 patients

Ultrasonic guidance for blood vessel access 76937

Ultrasonic guidance for blood vessel access is a medical procedure where sound waves are used to create images of your blood vessels. This helps doctors to accurately locate and access the vessels for treatments or tests, ensuring safety and precision.

45 services37 patients

Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes 99152

This procedure involves a doctor administering a medication to reduce your consciousness during a procedure. This helps in managing discomfort and anxiety. The initial application lasts for 15 minutes and is for individuals aged 5 years or older.

45 services39 patients

Ultrasound of aorta, vena cava, groin vessels or bypass grafts 93979

This procedure involves using sound waves to create images of your aorta, vena cava, groin vessels, or bypass grafts. It helps doctors check for issues like blockages or enlargements. It's non-invasive and painless.

44 services41 patients

Complete ultrasound of aorta, vena cava, groin vessels or bypass grafts 93978

This procedure involves using sound waves to create images of your aorta, vena cava, groin vessels, or bypass grafts. It helps to detect abnormalities or blockages, ensuring your blood flows smoothly. It's painless and non-invasive.

40 services38 patients

Ultrasound of both sides of head and neck blood flow 93880

26 services26 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

23 services23 patients

Review by radiologist of abdominal aorta image 75625

This is a procedure where a radiologist, a doctor specialized in medical imaging, examines an image of your abdominal aorta. The abdominal aorta is the large blood vessel that carries blood to your lower body. The radiologist checks for any abnormalities to ensure your overall vascular health.

22 services21 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

19 services19 patients

Ultrasound of one leg arteries or artery grafts 93926

18 services18 patients

Ultrasound of abdomen and pelvis artery and vein blood flow 93976

An ultrasound of your abdomen and pelvis arteries and veins is a non-invasive procedure that uses sound waves to create images of your blood vessels. This helps in assessing the flow of blood, identifying blockages, or detecting other abnormalities. It's a safe, painless process.

17 services16 patients

Destruction of first incompetent vein of arm or leg using radiofrequency and imaging guidance 36475

This procedure involves using radiofrequency energy, a type of heat energy, to close off an unhealthy vein in your arm or leg. Imaging guidance helps ensure precise targeting of the vein. This helps improve blood flow by rerouting it through healthier veins.

16 services14 patients

Review by radiologist of arm or leg artery image 75710

This procedure involves a radiologist examining images of your arm or leg arteries. These images are obtained through a non-invasive method, like an ultrasound or CT scan. The radiologist reviews these images to identify any abnormalities, such as blockages or narrowing, which can affect blood flow.

14 services13 patients

Ultrasound of hemodialysis access 93990

An ultrasound of hemodialysis access is a non-invasive procedure that uses sound waves to create images of your dialysis access site. It helps monitor the access site's health and detect any potential issues like blockages or narrowing.

13 services11 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

13 services11 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

11 services11 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Unc Hospitals

Acute Care Hospitals · Chapel Hill, NC

5/5 CMS rating

OwnershipGovernment - State

CMS Certification Number340061

Location101 Manning DriveChapel Hill, NC 27514 · Orange County

Emergency services Birthing friendly

Rex Hospital

Acute Care Hospitals · Raleigh, NC

5/5 CMS rating

OwnershipGovernment - State

CMS Certification Number340114

Location4420 Lake Boone TrailRaleigh, NC 27607 · Wake County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 27607 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$83.90 typical visit price

range $54.12 – $165.09

Typical copayment $20.97 (range $13.53 – $41.27)

Most-billed visit code 99203

Established Patient

$67.72 typical visit price

range $17.21 – $134.61

Typical copayment $16.93 (range $4.30 – $33.65)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

RALEIGH OB/GYN CENTRE, PA

Specialist

4414 LAKE BOONE TRL, SUITE 405
RALEIGH, NC 27607

Wake County (919) 875-8225

DR. MYRA LYNN TEASLEY M.D.

Specialist

4414 LAKE BOONE TRL, SUITE 300
RALEIGH, NC 27607

Wake County (919) 781-5510

SACHIN S MUDVARI MD

Ophthalmology (Retina Specialist)

4414 LAKE BOONE TRL, SUITE 302
RALEIGH, NC 27607

Wake County (919) 782-8038

STOCKS SURGICAL CENTER, PLLC

Specialist

4414 LAKE BOONE TRL, SUITE 309
RALEIGH, NC 27607

Wake County (919) 850-0880

ERIN C. BURNETTE NP

Nurse Practitioner (Family)

4414 LAKE BOONE TRL
RALEIGH, NC 27607

Wake County (919) 781-5510

NORTH RALEIGH CARDIOVASCULAR DISEASES PA

Specialist

4414 LAKE BOONE TRL, SUITE 409
RALEIGH, NC 27607

Wake County (919) 790-0130

DR. JENIFER RAE BRISCOE-BRIMMAGE MD

Obstetrics & Gynecology

4414 LAKE BOONE TRL, SUITE 405
RALEIGH, NC 27607

Wake County (919) 876-8225

MR. JAMES GLENDON TRENNER P.A.-C

Physician Assistant (Medical)

4414 LAKE BOONE TRL, SUITE 502
RALEIGH, NC 27607

Wake County (919) 875-0539

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Martyn Knowles's NPI number?

The NPI number for Martyn Knowles is 1265632731. It was assigned to this individual provider in the NPPES registry on July 23, 2007.

Where is Martyn Knowles located?

Martyn Knowles practices at 4414 Lake Boone Trl Suite 108, Raleigh, NC 27607. The listed phone number is (919) 397-9772.

What is Martyn Knowles's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Martyn Knowles enrolled in Medicare?

Yes. Martyn Knowles is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Martyn Knowles's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Martyn Knowles reassigns Medicare benefits to 2 organizations: North Carolina Mg, LLC (Raleigh, NC) and North Carolina Nephrology PA (Raleigh, NC). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Martyn Knowles's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Martyn Knowles accept?

Health plans from AmeriHealth Caritas Next, Blue Cross and Blue Shield of NC and UnitedHealthcare list Martyn Knowles as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Martyn Knowles affiliated with any hospitals?

According to CMS data, Martyn Knowles is affiliated with Unc Hospitals and Rex Hospital.

When was this NPI record last updated?

The NPPES record for Martyn Knowles was last updated on April 1, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.