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Edit this profileAt a glance
- 9250 N 3Rd Street, Suite 3010, Phoenix, AZ 85020
About Dr. Seifert
Based in Phoenix, AZ, Mark J. Seifert, MD is listed in the NPI registry under cardiac electrophysiology. Mark graduated from Johns Hopkins University School of Medicine in 1989. Mark is also listed as specializing in cardiovascular disease and clinical cardiac electrophysiology. According to Medicare claims data, Mark cared for 2,323 Medicare patients across 5,857 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, multiple lead or leadless pacemaker system, remote up to 90 days, and evaluation of cardiac rhythm monitor system, remote up to 30 days. NPI 1942201694 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
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
- (602) 861-1168
- Email not available
Practice Locations
9250 N 3RD STREET SUITE 3010
Phoenix, AZ 85020
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
Abnormal heart rhythms
Autonomic disorders
Conduction disorders
Dangerous heart rhythms
Device complications
Device issues
Fainting & reflex disorders
Genetic heart conditions
- Arrhythmogenic Right Ventricular Dysplasia
- Brugada Syndrome
- Catecholaminergic Polymorphic Ventricular Tachycardia
- Long QT syndrome
Heart failure and muscle
Heart muscle conditions
Heart rhythm disorders
Inherited rhythm disorders
Structural heart conditions
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
Catheter ablation
- AV Node Ablation
- Cardioneuroablation
- Cryoablation
- Epicardial Catheter Ablation
- Heart Flutter Ablation
- Pulsed Field Ablation
- PVC Ablation
- Ventricular Tachycardia Ablation
Device care
Device management
Device placement
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
Diagnostic monitoring
Diagnostic testing
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
Heart rhythm treatments
Medication management
Minor device procedures
Rhythm restoration
Stroke prevention
Procedures Most Often Billed to Medicare
5,857 services · 2,323 patients · 25 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Repair of left upper heart chamber with implant with review by radiologist | Procedure | 33340 |
37 | As often as other peers in Cardiac Electrophysiology |
| Insertion of heart rhythm monitor under skin | Procedure | 33285 |
22 | As often as other peers in Cardiac Electrophysiology |
| Insertion of pacemaker and upper and lower heart chamber electrode | Procedure | 33208 |
21 | As often as other peers in Cardiac Electrophysiology |
| Evaluation of single, dual, multiple lead or leadless pacemaker system or implantable defibrillator system, remote up to 90 days | Treatment | 93296 |
1,877 | More than most peers in Cardiac Electrophysiology |
| Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days | Treatment | 93294 |
1,439 | More than most peers in Cardiac Electrophysiology |
| Evaluation of cardiac rhythm monitor system, remote up to 30 days | Treatment | 93298 |
736 | More than most peers in Cardiac Electrophysiology |
| Evaluation of single, dual, or multiple lead implantable defibrillator system, remote up to 90 days | Treatment | 93295 |
445 | More than most peers in Cardiac Electrophysiology |
| Programming of dual lead pacemaker system | Treatment | 93280 |
354 | More than most peers in Cardiac Electrophysiology |
| Programming of multiple lead implantable defibrillator system | Treatment | 93284 |
69 | More often than most peers in Cardiac Electrophysiology |
| Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes | Treatment | 99152 |
68 | More often than most peers in 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 cardiac electrophysiology specialists in Phoenix 8
Same specialty, same city.
Trained at Johns Hopkins University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 15 related providers in 2 groups
Class of 1989 at Johns Hopkins University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Repair of left upper heart chamber with implant with review by radiologist 7
Providers in AZ who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Seifert?
Dr. Seifert is a cardiac electrophysiology in Phoenix, AZ. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Dr. Seifert's address?
Dr. Seifert is listed at 9250 N 3Rd Street Suite 3010, Phoenix, AZ 85020. 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. Seifert?
The number on file is (602) 861-1168. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Seifert's NPI number?
Dr. Seifert's National Provider Identifier is 1942201694. 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. Seifert train?
Dr. Seifert attended Johns Hopkins University School of Medicine, graduating in 1989. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Seifert been practicing?
Dr. Seifert has 37 years experience. Calculated from a graduation year of 1989, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Seifert perform?
According to Medicare billing data, Dr. Seifert performs procedures including repair of left upper heart chamber with implant with review by radiologist, insertion of heart rhythm monitor under skin and 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, multiple lead or leadless pacemaker 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. Seifert confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Seifert. If this is you, claiming it is free.
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