Dr. Marc W. Mayhew, MD
Interventional Cardiology (Interventional Cardiology Physician)
- Medicare participating
At a glance
- Years since graduation
- 31
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 944
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Interventional Cardiology Physician primary
TN license 43665 -
Cardiovascular Disease Physician
TN license 43665 -
Internal Medicine Physician
AL license 24890
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Wellmont Holston Valley Medical Center Kingsport, TN
- Johnston Memorial Hospital Abingdon, VA
- Indian PAth Community Hospital Kingsport, TN
- Lonesome Pine Hospital Big Stone Gap, VA
- Hawkins County Memorial Hospital Rogersville, TN
Medical groups
- Wellmont Cardiology Services (139 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 944
- Services billed
- 1,545
- Patients’ average age
- 75
| Service | Times | Patients |
|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 627 | 476 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 136 | 124 |
| Blood test, clotting time | 122 | 55 |
| Insertion of needle into vein for collection of blood sample | 108 | 98 |
| Established patient office or other outpatient visit, 30-39 minutes | 102 | 95 |
| Ct scan of blood vessels of abdomen and pelvis with contrast | 101 | 93 |
| Ct scan of blood vessels of chest with contrast | 96 | 90 |
| Ct scan of blood vessels and grafts of heart with contrast | 65 | 65 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 61 | 40 |
| Insertion of tube in left lower heart chamber and coronary artery for diagnosis with review by radiologist | 36 | 36 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Eliquis (apixaban) Other prescribers in Kingsport, TN | 378 |
| Metoprolol Succinate Other prescribers in Kingsport, TN | 257 |
| Clopidogrel (clopidogrel bisulfate) Other prescribers in Kingsport, TN | 246 |
| Isosorbide Mononitrate Er (isosorbide mononitrate) Other prescribers in Kingsport, TN | 226 |
| Metoprolol Tartrate Other prescribers in Kingsport, TN | 166 |
| Atorvastatin Calcium Other prescribers in Kingsport, TN | 163 |
| Carvedilol Other prescribers in Kingsport, TN | 146 |
| Amlodipine Besylate Other prescribers in Kingsport, TN | 111 |
| Rosuvastatin Calcium Other prescribers in Kingsport, TN | 111 |
| Ranolazine Er (ranolazine) Other prescribers in Kingsport, TN | 92 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 13 companies reported 55 payments worth $1,255 in total to this clinician.
| Abbott Laboratories | $325 |
|---|---|
| Boston Scientific Corporation | $310 |
| Abiomed | $232 |
| E.r. Squibb & Sons, L.l.c. | $80.81 |
| Zoll Services LLC (a/k/a Zoll Lifecor Corp) | $70.35 |
| Angiodynamics, Inc. | $42.32 |
| Shockwave Medical, Inc | $41.30 |
| Edwards Lifesciences Corporation | $40.81 |
| Food and Beverage | $1,255 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.
Industry-funded research
Named as a principal investigator on 1 industry-funded study in 2025, from 1 company. The companies reported $1,950 in research payments for these studies, mostly to the institutions running them.
- Ultrasound-facilitated, Catheter-directed, Thrombolysis in Intermediate-high Risk Pulmonary Embolism
Boston Scientific Corporation · Active, not recruiting · NCT04790370
From CMS Open Payments research payments, where companies name up to five principal investigators per payment. Research payments usually go to hospitals, universities and research sites, not to the investigator personally. A payment is not evidence of wrongdoing.