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

Dr. Mason Marcus, MD

Individual provider Internal Medicine Physician · NPI 1003300617

Dr. Mason Marcus, MD is an Internal Medicine in Dallas, Texas. Graduated from University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb) in 2018, 8 years ago. Licensed in Massachusetts, New Mexico and Texas.

Years since qualifying
8
Trained at
University of Illinois College of Med (CHI/PEOR/ROCK/Chm-Urb)
Licensed in
MA, NM, TX
In the registry since
2018
Specialties on file
4
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

5323 Harry Hines Blvd
Dallas, TX 75390-5400
Phone: (214) 645-8000
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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 MD2026-0339 (NM)
Internal Medicine Physician Taxonomy 207R00000X · Licence T5387 (TX)
Cardiovascular Disease Physician Taxonomy 207RC0000X · Licence MD2026-0339 (NM)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X · Licence 276344 (MA)

Record details

NPI number1003300617
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 18, 2018
Last updated in NPPESJune 15, 2026
Certification dateJune 15, 2026

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolUNIVERSITY OF ILLINOIS COLLEGE OF MED (CHI/PEOR/ROCK/CHM-URB)
Graduated 2018 (8 years in practice)
Accepts Medicare assignment Not indicated

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