Dr. Roy M. John, MD
Cardiac Electrophysiology (Clinical Cardiac Electrophysiology Physician)
300 Pasteur Dr
Stanford, CA 94305
Who else practices at this address →
Santa Clara County includes mental health (13% of residents) shortage areas. About shortage areas
- Medicare participating
At a glance
- Years since graduation
- 47
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 723
Licensed in California since 2021, according to the Medical Board of California. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
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
CA license C172396 (first issued 2021; current) -
Cardiovascular Disease Physician
CA license C172396 (first issued 2021; current) -
Internal Medicine Physician
CA license C172396 (first issued 2021; current)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Stanford Health Care Stanford, CA
- Stanford Health Care Tri-Valley Pleasanton, CA
Medical groups
- Stanford Health Care (3,122 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
- 723
- Services billed
- 1,263
- Patients’ average age
- 75
| Service | Times | Patients |
|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 460 | 386 |
| Established patient office or other outpatient visit, 40-54 minutes | 137 | 116 |
| Heart rhythm review and interpretation of continous external ekg over 8-15 days | 83 | 78 |
| New patient office or other outpatient visit, 45-59 minutes | 44 | 44 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 44 | 35 |
| Established patient office or other outpatient visit, 30-39 minutes | 41 | 40 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 33 | 31 |
| Programming of dual lead pacemaker system | 31 | 28 |
| Comprehensive electrophysiologic evaluation with catheter destruction of abnormality causing atrial fibrillation (uncoordinated contraction of upper chambers of heart) by pulmonary vein isolation | 31 | 31 |
| Insertion of catheters and destruction of tissue to treat abnormal heart rhythm | 29 | 25 |
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 Stanford, CA | 188 |
| Metoprolol Succinate Other prescribers in Stanford, CA | 121 |
| Metoprolol Tartrate Other prescribers in Stanford, CA | 60 |
| Flecainide Acetate Other prescribers in Stanford, CA | 57 |
| Xarelto (rivaroxaban) Other prescribers in Stanford, CA | 49 |
| Amiodarone Hcl Other prescribers in Stanford, CA | 43 |
| Diltiazem 24hr Er (Cd) (diltiazem hcl) Other prescribers in Stanford, CA | 25 |
| Losartan Potassium Other prescribers in Stanford, CA | 17 |
| Carvedilol Other prescribers in Stanford, CA | 12 |
| Spironolactone Other prescribers in Stanford, CA | 12 |
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, 4 companies reported 46 payments worth $8,938 in total to this clinician.
| Biosense Webster, Inc. | $5,805 |
|---|---|
| Abbott Laboratories | $2,593 |
| Boston Scientific Corporation | $367 |
| Medtronic, Inc. | $173 |
| Consulting Fee | $3,850 |
|---|---|
| Travel and Lodging | $3,456 |
| Food and Beverage | $1,632 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Biosense Webster, Inc. Oct 17, 2025 | Consulting Fee | $3,850 |
| Abbott Laboratories Sep 26, 2025 | Travel and Lodging AVEIR · Structural Heart · travel to Atlanta, GA · in-kind | $648 |
| Abbott Laboratories Sep 26, 2025 | Travel and Lodging AVEIR · Structural Heart · travel to Atlanta, GA · in-kind | $499 |
| Biosense Webster, Inc. Nov 1, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Carlsbad, CA · in-kind | $482 |
| Abbott Laboratories Sep 26, 2025 | Travel and Lodging AVEIR · Structural Heart · travel to Atlanta, GA · in-kind | $293 |
| Biosense Webster, Inc. Jul 14, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Carlsbad, CA · in-kind | $262 |
| Biosense Webster, Inc. Aug 8, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Carlsbad, CA · in-kind | $236 |
| Boston Scientific Corporation Jan 16, 2025 | Travel and Lodging FARAPULSE · FARAPULSE_EP · travel to Washington, DC, WA | $207 |
| Abbott Laboratories Oct 7, 2025 | Travel and Lodging AVEIR · Structural Heart · travel to Atlanta, GA · in-kind | $203 |
| Biosense Webster, Inc. Aug 11, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Carlsbad, CA · in-kind | $174 |
All 15 payments other than meals, newest first
| Company | What it was for | Amount |
|---|---|---|
| Abbott Laboratories Nov 20, 2025 | Travel and Lodging AVEIR · Structural Heart · travel to Atlanta, GA · in-kind | $113 |
| Biosense Webster, Inc. Nov 1, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Carlsbad, CA · in-kind | $482 |
| Biosense Webster, Inc. Oct 17, 2025 | Consulting Fee | $3,850 |
| Biosense Webster, Inc. Oct 17, 2025 | Travel and Lodging travel to STANFORD, CA | $146 |
| Abbott Laboratories Oct 7, 2025 | Travel and Lodging AVEIR · Structural Heart · travel to Atlanta, GA · in-kind | $203 |
| Abbott Laboratories Sep 26, 2025 | Travel and Lodging AVEIR · Structural Heart · travel to Atlanta, GA · in-kind | $648 |
| Abbott Laboratories Sep 26, 2025 | Travel and Lodging AVEIR · Structural Heart · travel to Atlanta, GA · in-kind | $499 |
| Abbott Laboratories Sep 26, 2025 | Travel and Lodging AVEIR · Structural Heart · travel to Atlanta, GA · in-kind | $293 |
| Abbott Laboratories Sep 26, 2025 | Travel and Lodging AVEIR · Structural Heart · travel to Atlanta, GA · in-kind | $151 |
| Abbott Laboratories Sep 26, 2025 | Travel and Lodging AVEIR · Structural Heart · travel to Atlanta, GA · in-kind | $32.73 |
| Abbott Laboratories Sep 26, 2025 | Travel and Lodging AVEIR · Structural Heart · travel to Atlanta, GA · in-kind | $9.02 |
| Biosense Webster, Inc. Aug 11, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Carlsbad, CA · in-kind | $174 |
| Biosense Webster, Inc. Aug 8, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Carlsbad, CA · in-kind | $236 |
| Biosense Webster, Inc. Jul 14, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Carlsbad, CA · in-kind | $262 |
| Boston Scientific Corporation Jan 16, 2025 | Travel and Lodging FARAPULSE · FARAPULSE_EP · travel to Washington, DC, WA | $207 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
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.