Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mark J Seifert, MD

Individual provider Cardiovascular Disease Physician · NPI 1942201694

Mark J Seifert, MD is a Cardiac Electrophysiology in Phoenix, Arizona. Graduated from Johns Hopkins University School of Medicine in 1989, 37 years ago. Practices with Honorhealth Ambulatory, a 625-clinician group and accepts Medicare assignment. Licensed in Arizona.

Years since qualifying
37
Trained at
Johns Hopkins University School of Medicine
Licensed in
AZ
In the registry since
2005
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

9250 N 3rd St Ste 3010
Phoenix, AZ 85020-2425
Phone: (602) 861-1168
Fax: (602) 861-1763
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Cardiac Electrophysiology Physician (primary) Taxonomy 207RC0001X · Licence 33429 (AZ)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence 33429 (AZ)

Record details

NPI number1942201694
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 3, 2005
Last updated in NPPESSeptember 13, 2013
Mailing address2500 W Utopia Rd, Ste. 100, Phoenix, AZ 85027-4171

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCARDIAC ELECTROPHYSIOLOGY
Also practisesCARDIOVASCULAR DISEASE (CARDIOLOGY), FAMILY PRACTICE
Medical schoolJOHNS HOPKINS UNIVERSITY SCHOOL OF MEDICINE
Graduated 1989 (37 years in practice)
Group practice Honorhealth Ambulatory — 625 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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