Mark J. Seifert, MD
Clinical Cardiac Electrophysiology Physician · Phoenix, AZ
Mark J. Seifert, MD is a clinical cardiac electrophysiology physician with a practice address in Phoenix, Arizona, and NPI 1942201694, issued on Aug 3, 2005. Check the license (Arizona 33429, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark J. Seifert
- Credential
- MD
- Primary taxonomy
- Clinical Cardiac Electrophysiology Physician 207RC0001X
- License number
- 33429 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 9250 N 3RD Street, Phoenix, AZ 85020
- Phone
- (602) 861-1168
- Enumerated
- Aug 3, 2005
- Record last updated
- Sep 13, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (602) 861-1763
- Medicaid ID
- 363599 AZ
- Medicare enrollment
- Enrolled (PECOS I20041124000721); accepts Medicare assignment
- Medical or professional school
- Johns Hopkins University School Of Medicine, 1989
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest clinical cardiac electrophysiology physician records → All 81 in Arizona → Look up another NPI →
Also registered at 9250 N 3RD Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Kevin Gilchrist, M.D.Anatomic Pathology & Clinical Pathology Physician1568626984
- Parveen Ranjan, M.D.Anatomic Pathology & Clinical Pathology Physician1659434702
- Louis Rappoport, M.D.Orthopaedic Surgery of the Spine Physician1497778740
- Christopher Stasik, D.O.Anatomic Pathology & Clinical Pathology Physician1437360815
Verify Mark J. Seifert in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 33429Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% fewer Medicare Part D claims than the average clinical cardiac electrophysiology physician in 2024
741 Medicare Part D claims for 271 beneficiaries, against an average of 1,710 among the 3,173 providers of this specialty who prescribed in Part D. Brand-name drugs were 32% of claims.
Most prescribed
- Eliquis150 claims
- Amiodarone Hcl119 claims
- Clopidogrel110 claims
- Flecainide Acetate87 claims
- Multaq51 claims
- Digoxin40 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $5,345.14
78 payments; by number, the most common kind was food and beverage; the largest payer was Abbott Laboratories. The 3,167 providers of this specialty with any payment received $10,651.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Honorhealth AmbulatoryScottsdale, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark J. Seifert among 81 clinical cardiac electrophysiology physician records in Arizona
Mark J. Seifert, MD is one of 81 clinical cardiac electrophysiology physician records with a practice address in Arizona. 99% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 80% newer
- In a Medicare fileYes · 99% of these records are
- In the CMS Doctors and Clinicians fileYes · 91% of these records are
- Graduated1989 · median 2000 among the 74 with a school on file
- Record last updated2013 · 44% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0001X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Clinical Cardiac Electrophysiology Physician providers in Arizona
There are 81 clinical cardiac electrophysiology physician records in Arizona.
All 81 in Arizona → Every provider in Phoenix → Clinical Cardiac Electrophysiology Physician nationwide →
The 8 clinical cardiac electrophysiology physician records with the nearest ZIP codes
- Mohamed Abdelrahman, M.D.Phoenix, AZ 850161457606261
- Marwan Bahu, M.D.Phoenix, AZ 850161114920618
- Robert Lemery, MDPhoenix, AZ 850161992288567
- Akash Makkar, M.D.Phoenix, AZ 850161770612848
- Vijendra Swarup, M.D.Phoenix, AZ 850161427051929
- Divyashree Varma, M.D.Phoenix, AZ 850161710205000
- Sushmitha Patibandla, M.D.Phoenix, AZ 850271083946917
- Siamak Rassadi, M.D.Phoenix, AZ 850311457500613
Common questions
What is Mark J. Seifert, MD's NPI number?
Mark J. Seifert, MD's National Provider Identifier (NPI) is 1942201694, issued on Aug 3, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark J. Seifert, MD located?
The NPPES record lists a practice address at 9250 N 3RD Street, Phoenix, AZ, 85020. Phone: (602) 861-1168. Providers update this record themselves, so call before visiting.
How can I verify Mark J. Seifert, MD's license?
NPPES lists Arizona license number 33429, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark J. Seifert, MD prescribe under Medicare Part D?
In 2024, Mark J. Seifert, MD had 741 Medicare Part D claims for 271 beneficiaries; the average among clinical cardiac electrophysiology physician prescribers was 1,710. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.