Physician Profile
Alexi P. Zemsky, MD
Unclaimed ProfileAbout Dr. Zemsky
Based in Portland, OR, Alexi P. Zemsky, MD is listed in the NPI registry under clinical cardiac electrophysiology. Alexi graduated from Tulane University School of Medicine in 2002. Alexi is also listed as specializing in cardiovascular disease. According to Medicare claims data, Alexi cared for 1,280 Medicare patients across 1,416 services. The services billed most often include evaluation of single, dual, multiple lead or leadless pacemaker system or implantable defibrillator system, remote up to 90 days, evaluation of single, dual, or multiple lead implantable defibrillator system, remote up to 90 days, and evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (503) 962-1000
- Email not available
Practice Locations
4400 NE HALSEY ST STE 102
Portland, OR 97213
1111 NE 99th Ave Suite 201
Portland, OR 97220
Conditions Commonly Evaluated or Treated
Within Clinical Cardiac Electrophysiology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- AFib
- Arrhythmias
- Coronary artery disease
- Heart attack
Abnormal heart rhythms
- Atrial Tachycardia
- Premature atrial contractions
Autonomic disorders
Conduction disorders
- Bundle Branch Block
- Heart block
- Junctional Rhythm
- Tachy-Brady Syndrome
Dangerous heart rhythms
- Cardiac Arrest
- Ventricular Fibrillation
- Ventricular tachycardia
Device complications
Device issues
- Frequent Defibrillator Shocks
- Pacemaker Syndrome
Fainting & reflex disorders
- Carotid Sinus Hypersensitivity
Genetic heart conditions
- Arrhythmogenic Right Ventricular Dysplasia
- Brugada Syndrome
- Catecholaminergic Polymorphic Ventricular Tachycardia
- Long QT syndrome
Heart failure and muscle
- Weak Heart Muscle
Heart muscle conditions
- Cardiac Sarcoidosis
- Hypertrophic cardiomyopathy
Heart rhythm disorders
- Inappropriate Sinus Tachycardia
- Supraventricular tachycardia
- Wolff-Parkinson-White Syndrome
Inherited rhythm disorders
- Short QT Syndrome
Structural heart conditions
- Arrhythmic Mitral Valve Prolapse
Symptoms
- Dizziness and Lightheadedness
- Fainting and syncope
- Heart palpitations
- Premature ventricular contractions
- Slow heart rate (bradycardia)
Procedures & services
Most searched procedures
- AFib ablation
- Angioplasty and stenting
- Cardiac catheterization
- Pacemaker implantation
- Watchman procedure
Advanced therapies
- Stereotactic Cardiac Radioablation (STAR)
Catheter ablation
- AV Node Ablation
- Cardioneuroablation
- Cryoablation
- Epicardial Catheter Ablation
- Heart Flutter Ablation
- Pulsed Field Ablation
- PVC Ablation
- Ventricular Tachycardia Ablation
Device care
- Pacemaker Check
- Remote Device Monitoring
Device management
- Pacemaker or Defibrillator Reprogramming
Device placement
- Extravascular Defibrillator Placement (EV-ICD)
Device procedures
- Cardiac resynchronization therapy device placement
- Conduction System Pacing
- Implantable cardioverter-defibrillator placement
- Leadless Pacemaker Placement
- Pacemaker Battery Replacement
- Pacemaker Lead Removal
- Subcutaneous Defibrillator Placement
Diagnostic imaging
- Cardiac MRI for Heart Scarring
- Transesophageal echocardiogram
Diagnostic monitoring
- 24-Hour Holter Monitor
- Exercise Stress Test for Arrhythmia
Diagnostic testing
- Brugada Drug Challenge Test
- Carotid Sinus Massage
Diagnostic tests
- 30-Day Cardiac Event Monitor
- Electrophysiology study
- Genetic Arrhythmia Testing
- Heart monitor
- Implantable Loop Recorder (Cardiac Monitor Implant)
- Tilt Table Test
- Wearable Heart Patch Monitor
External devices
- LifeVest Fitting
Heart rhythm treatments
- AED Shock or Defibrillation
Medication management
- Heart Rhythm Medication Management
Minor device procedures
- Loop Recorder Removal
Rhythm restoration
Stroke prevention
Procedures Most Often Billed to Medicare
1,416 services · 1,280 patients · 21 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of pacemaker and upper and lower heart chamber electrode | Procedure | 33208 |
29 | As often as other peers in Clinical Cardiac Electrophysiology |
| Evaluation of single, dual, multiple lead or leadless pacemaker system or implantable defibrillator system, remote up to 90 days | Treatment | 93296 |
362 | As often as other peers in Clinical Cardiac Electrophysiology |
| Evaluation of single, dual, or multiple lead implantable defibrillator system, remote up to 90 days | Treatment | 93295 |
225 | More often than most peers in Clinical Cardiac Electrophysiology |
| Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days | Treatment | 93294 |
142 | Less often than most peers in Clinical Cardiac Electrophysiology |
| Routine electrocardiogram (ecg) using at least 12 leads with tracing | Treatment | 93005 |
110 | More often than most peers in Clinical Cardiac Electrophysiology |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | Treatment | 93010 |
99 | Less often than most peers in Clinical Cardiac Electrophysiology |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
37 | Less often than most peers in Clinical Cardiac Electrophysiology |
| Programming of dual lead pacemaker system | Treatment | 93280 |
36 | Less often than most peers in Clinical Cardiac Electrophysiology |
| Programming of multiple lead implantable defibrillator system | Treatment | 93284 |
28 | Less often than most peers in Clinical Cardiac Electrophysiology |
| Comprehensive electrophysiologic evaluation with catheter destruction of abnormality causing atrial fibrillation (uncoordinated contraction of upper chambers of heart) by pulmonary vein isolation | Treatment | 93656 |
21 | Less often than most peers in Clinical Cardiac Electrophysiology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other clinical cardiac electrophysiology specialists in Portland 8
Same specialty, same city.
Trained at Tulane University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 16 related providers in 2 groups
Class of 2002 at Tulane University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of pacemaker and upper and lower heart chamber electrode 8
Providers in OR who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Zemsky?
Dr. Zemsky is a clinical cardiac electrophysiology in Portland, OR. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Dr. Zemsky's address?
Dr. Zemsky is listed at 4400 Ne Halsey St Ste 102, Portland, OR 97213. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Zemsky?
The number on file is (503) 962-1000. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Zemsky's NPI number?
Dr. Zemsky's National Provider Identifier is 1598944928. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Zemsky train?
Dr. Zemsky attended Tulane University School of Medicine, graduating in 2002. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Zemsky been practicing?
Dr. Zemsky has 24 years experience. Calculated from a graduation year of 2002, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Zemsky perform?
According to Medicare billing data, Dr. Zemsky performs procedures including insertion of pacemaker and upper and lower heart chamber electrode; provides treatments such as evaluation of single, dual, multiple lead or leadless pacemaker system or implantable defibrillator system, remote up to 90 days and evaluation of single, dual, or multiple lead implantable defibrillator system, remote up to 90 days, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Zemsky confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Zemsky. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.