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

Individual provider Cardiovascular Disease Physician · NPI 1225534126

Zachary Dean Demertzis, DO is a Cardiovascular Disease Physician in Chicago, Illinois. Licensed in Illinois and Michigan. Registered with an NPI since 2018.

Licensed in
IL, MI
In the registry since
2018
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

1620 W Harrison St
Chicago, IL 60612-3801
Phone: (312) 942-5000
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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 036174746 (IL)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence 5101026289 (MI)

Record details

NPI number1225534126
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 1, 2018
Last updated in NPPESJune 18, 2025
Certification dateJune 18, 2025

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