Zachary Dean Demertzis, DO
Clinical Cardiac Electrophysiology Physician · Chicago, IL
Zachary Dean Demertzis, DO is a clinical cardiac electrophysiology physician with a practice address in Chicago, Illinois, and NPI 1225534126, issued on Apr 1, 2018. Check the license (Illinois 036174746, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Zachary Dean Demertzis
- Credential
- DO
- Primary taxonomy
- Clinical Cardiac Electrophysiology Physician 207RC0001X
- License numbers
- 036174746 IL
5101026289 MI
Self-reported in NPPES; status is on the state search - Practice location
- 1620 W Harrison St, Chicago, IL 60612
- Phone
- (312) 942-5000
- Enumerated
- Apr 1, 2018
- Record last updated
- Jun 18, 2025
- Entity
- Type 1 · individual
8 nearest clinical cardiac electrophysiology physician records → All 166 in Illinois → Look up another NPI →
Also registered at 1620 W Harrison St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kylie Abernathy, OTOccupational Therapist1518489269
- Iris Abrahantes Morales, MDObstetrics & Gynecology Physician1164155164
- Sunaina Addanki, MDInternal Medicine Physician1396593349
- Favour AdebayoPhysical Therapist1245072081
- Adebanke Adeyemi, MDInternal Medicine Physician1922933936
- Emily Adochio-Clancy, MDInfectious Disease Physician1629606975
Verify Zachary Dean Demertzis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036174746Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average clinical cardiac electrophysiology physician in 2024
62 Medicare Part D claims for 24 beneficiaries, against an average of 1,710 among the 3,173 providers of this specialty who prescribed in Part D.
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: $405.86
6 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.
Zachary Dean Demertzis among 166 clinical cardiac electrophysiology physician records in Illinois
Zachary Dean Demertzis, DO is one of 166 clinical cardiac electrophysiology physician records with a practice address in Illinois. 92% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 95% of them.
- NPI issued2018 · 95% of these records are older, 2% newer
- In a Medicare fileYes · 92% of these records are
- In the CMS Doctors and Clinicians fileNo · 83% of these records are
- Record last updated2025 · 49% 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 Illinois 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 Illinois
There are 166 clinical cardiac electrophysiology physician records in Illinois.
All 166 in Illinois → Every provider in Chicago → Clinical Cardiac Electrophysiology Physician nationwide →
The 8 clinical cardiac electrophysiology physician records with the nearest ZIP codes
- Timothy Larsen, D.O.Chicago, IL 606121477845337
- Alexander Mazur, MDChicago, IL 606121710172515
- Alejandro Sanchez-Nadales, MDChicago, IL 606121619561586
- Jamario Skeete, M.D.Chicago, IL 606121356894042
- Richard Trohman, M.D.Chicago, IL 606121932128733
- Oleg Yurevich, MDChicago, IL 606121326482571
- Aamir Ahmed, MDChicago, IL 606111992297931
- Alexandru Chicos, MDChicago, IL 606111316138704
Common questions
What is Zachary Dean Demertzis, DO's NPI number?
Zachary Dean Demertzis, DO's National Provider Identifier (NPI) is 1225534126, issued on Apr 1, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Zachary Dean Demertzis, DO located?
The NPPES record lists a practice address at 1620 W Harrison St, Chicago, IL, 60612. Phone: (312) 942-5000. Providers update this record themselves, so call before visiting.
How can I verify Zachary Dean Demertzis, DO's license?
NPPES lists Illinois license number 036174746, as entered by the provider. Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Zachary Dean Demertzis, DO prescribe under Medicare Part D?
In 2024, Zachary Dean Demertzis, DO had 62 Medicare Part D claims for 24 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.