Dr. James J. Merrill, MD
Cardiac Electrophysiology (Clinical Cardiac Electrophysiology Physician)
At a glance
- In the NPI registry since
- 2006
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
-
Clinical Cardiac Electrophysiology Physician primary
TN license 25496 · VA license 0101050765 -
Cardiovascular Disease Physician
TN license 25496 · VA license 0101050765 -
Internal Medicine Physician
TN license 25496
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Medicare patients and services
| Service | Times | Patients |
|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 67 | 63 |
| Established patient office or other outpatient visit, 30-39 minutes | 53 | 51 |
| External shock to heart to regulate heart beat | 32 | 26 |
| Comprehensive electrophysiologic evaluation with catheter destruction of abnormality causing atrial fibrillation (uncoordinated contraction of upper chambers of heart) by pulmonary vein isolation | 23 | 23 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 16 | 15 |
| Blood test, basic group of blood chemicals (calcium, total) | 13 | 13 |
| Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | 13 | 13 |
| Established patient office or other outpatient visit, 40-54 minutes | 11 | 11 |
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 |
|---|---|
| Xarelto (rivaroxaban) Other prescribers in Kingsport, TN | 13 |
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, 1 companies reported 13 payments worth $240 in total to this clinician.
| Abbott Laboratories | $240 |
|---|
| Food and Beverage | $240 |
|---|
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.