Dr. Sei Iwai, MD
Cardiac Electrophysiology (Clinical Cardiac Electrophysiology Physician)
- Medicare participating
At a glance
- Medical school
- Columbia University College of Physicians and Surgeons (1994)
- Years since graduation
- 32
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 913
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
- 1994Medical school: Columbia University College of Physicians and Surgeons
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
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
KY license 62473 · NY license 205205 -
Cardiovascular Disease Physician
NY license 205205 -
Internal Medicine Physician
NY license 205205
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Westchester Medical Center Valhalla, NY
- Garnet Health Medical Center Middletown, NY
- Phelps Hospital Sleepy Hollow, NY
- Montefiore St Luke's Cornwall Newburgh, NY
- Healthalliance Hospital Marys Avenue Campus Kingston, NY
Medical groups
- Westchester Medical Center Advanced Physician Services PC (897 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
- 913
- Services billed
- 2,246
- Patients’ average age
- 76
| Service | Times | Patients |
|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 764 | 554 |
| Evaluation of single, dual, multiple lead or leadless pacemaker system or implantable defibrillator system, remote up to 90 days | 424 | 165 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 278 | 218 |
| Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days | 275 | 105 |
| Evaluation of single, dual, or multiple lead implantable defibrillator system, remote up to 90 days | 156 | 63 |
| Evaluation of cardiac rhythm monitor system, remote up to 30 days | 131 | 34 |
| Interrogation device evaluation(s), (remote) up to 30 days; implantable cardiovascular physiologic monitor system, implantable loop recorder system, or subcutaneous cardiac rhythm monitor system, remote data acquisition(s), receipt of transmissions and tec | 123 | 34 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 87 | 55 |
| Established patient office or other outpatient visit, 30-39 minutes | 71 | 54 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 56 | 56 |
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 |
|---|---|
| Flecainide Acetate Other prescribers in Hawthorne, NY | 61 |
| Metoprolol Succinate Other prescribers in Hawthorne, NY | 50 |
| Eliquis (apixaban) Other prescribers in Hawthorne, NY | 34 |
| Multaq (dronedarone hcl) Other prescribers in Hawthorne, NY | 28 |
| Dofetilide | 16 |
| Xarelto (rivaroxaban) Other prescribers in Hawthorne, NY | 14 |
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, 11 companies reported 46 payments worth $10,969 in total to this clinician.
| Biotronik Inc. | $6,335 |
|---|---|
| Biosense Webster, Inc. | $2,132 |
| Cardiofocus, Inc. | $1,389 |
| Abiomed | $342 |
| Asahi Intecc USA, Inc. | $180 |
| Impulse Dynamics (USA) Inc. | $143 |
| Abbott Laboratories | $125 |
| Vektor Medical Inc. | $105 |
| Travel and Lodging | $5,644 |
|---|---|
| Food and Beverage | $2,925 |
| Speaking at a medical education program | $2,400 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Cardiofocus, Inc. Dec 9, 2025 | Travel and Lodging Atrial Fibrillation · travel to SOUTH LANCASTER, MA · in-kind | $1,389 |
| Biotronik Inc. Dec 23, 2025 | Speaking at a medical education programCompany’s description50011206 | $1,200 |
| Biotronik Inc. May 15, 2025 | Speaking at a medical education programCompany’s description50004540 | $1,200 |
| Biotronik Inc. Mar 6, 2025 | Travel and Lodging travel to Scottsdale, AZ · in-kind | $1,033 |
| Biosense Webster, Inc. Nov 6, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Pomona, CA · in-kind | $629 |
| Biosense Webster, Inc. Nov 15, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Pomona, CA · in-kind | $573 |
| Biotronik Inc. Apr 18, 2025 | Travel and Lodging travel to Phoenix, AZ · in-kind Company’s descriptionACH DEBIT | $447 |
| Biotronik Inc. Feb 19, 2025 | Travel and Lodging travel to New York, NY · in-kind | $395 |
| Biotronik Inc. Feb 19, 2025 | Travel and Lodging travel to Phoenix, AZ · in-kind | $278 |
| Biosense Webster, Inc. Nov 6, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Pomona, CA · in-kind | $256 |
All 13 payments other than meals, newest first
| Company | What it was for | Amount |
|---|---|---|
| Biotronik Inc. Dec 23, 2025 | Speaking at a medical education programCompany’s description50011206 | $1,200 |
| Cardiofocus, Inc. Dec 9, 2025 | Travel and Lodging Atrial Fibrillation · travel to SOUTH LANCASTER, MA · in-kind | $1,389 |
| Biosense Webster, Inc. Nov 17, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Pomona, CA · in-kind | $243 |
| Biosense Webster, Inc. Nov 15, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Pomona, CA · in-kind | $573 |
| Biosense Webster, Inc. Nov 6, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Pomona, CA · in-kind | $629 |
| Biosense Webster, Inc. Nov 6, 2025 | Travel and Lodging CARTO 3 · Cardiology · travel to Pomona, CA · in-kind | $256 |
| Biotronik Inc. May 15, 2025 | Speaking at a medical education programCompany’s description50004540 | $1,200 |
| Biotronik Inc. Apr 18, 2025 | Travel and Lodging travel to Phoenix, AZ · in-kind Company’s descriptionACH DEBIT | $447 |
| Biotronik Inc. Apr 10, 2025 | Travel and Lodging travel to Phoenix, AZ Company’s description50003309 | $200 |
| Biotronik Inc. Apr 10, 2025 | Travel and Lodging travel to Phoenix, AZ Company’s description50003309 | $200 |
| Biotronik Inc. Mar 6, 2025 | Travel and Lodging travel to Scottsdale, AZ · in-kind | $1,033 |
| Biotronik Inc. Feb 19, 2025 | Travel and Lodging travel to New York, NY · in-kind | $395 |
| Biotronik Inc. Feb 19, 2025 | Travel and Lodging travel to Phoenix, AZ · in-kind | $278 |
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.