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

Dr. Justin T Mao, MD

Individual provider Internal Medicine Physician · NPI 1427052273

Dr. Justin T Mao, MD is a Cardiac Electrophysiology in Downers Grove, Illinois. Qualified in 2001, 25 years ago. Practices with Advocate Health and Hospitals Corporation, a 3,079-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Illinois, Massachusetts and Michigan.

Years since qualifying
25
Licensed in
IL, MA, MI
In the registry since
2005
Specialties on file
5
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

3825 Highland Ave Fl TOWER24
Downers Grove, IL 60515-1552
Phone: (630) 719-4799
Fax: (630) 963-7420
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1340 Charles St Ste 300, Rockford, IL 61104-2200 — (815) 490-5888

Specialties & licences

Clinical Cardiac Electrophysiology Physician (primary) Taxonomy 207RC0001X · Licence 036-124995 (IL)
Internal Medicine Physician Taxonomy 207R00000X · Licence 219331 (MA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 036-124995 (IL)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence 036-124995 (IL)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence 225456 (MI)

Record details

NPI number1427052273
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 9, 2005
Last updated in NPPESApril 21, 2025
Certification dateApril 21, 2025

Medicare enrollment

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

Medicare specialtyCARDIAC ELECTROPHYSIOLOGY
Also practisesCARDIAC SURGERY
Medical schoolOTHER
Graduated 2001 (25 years in practice)
Group practice Advocate Health And Hospitals Corporation — 3079 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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