NPI age
8 years
Enumerated 2018-06-18
● Active
Type 1 · Individual
Dr. Mason Marcus, MD
Marcus is 1 of 37 clinical cardiac electrophysiology (internal medicine) providers in Dallas and 1 of 316 in Texas.
Primary specialty
Clinical Cardiac Electrophysiology (Internal Medicine)
Plus 3 subspecialties
Licensed in
NM, MA, TX
3 states
Status
Active
No deactivations on record
Last NPPES update
2026-09-28
Source: CMS NPPES provider record
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 316 active clinical cardiac electrophysiology (internal medicine) providers in Texas.
NPI age
8 years
↓ 10 yr below median (18 yr)
State licenses
3 states
Top 75% — 24% of peers are multi-state
Subspecialties
3
In the 73% of peers with subspecialties
NPI lifetime · 2018 → 2026
2018-06Enumerated in NPPES
2018
2026
Where they practice
Practice location
5323 Harry Hines Blvd
Dallas, TX 753905400
Mailing address
2844 Alden Ave
Dallas, TX 752112719
Specialties
-
Internal Medicine PrimaryA field of special interest within the subspecialty of cardiovascular disease, specialty of Internal Medicine, which involves intricate technical procedures to evaluate heart rhythms and determine appropriate treatment for them.
-
Internal MedicineA physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer,...
-
Internal MedicineAn internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
-
Student in an Organized Health Care Education/Training ProgramAn individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.
Practice context
Part of a multi-provider practice. 4,137 other active providers share this practice address in NPPES.
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