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Internist, Oncology Specialist (cancer)
28 years of experience
Accepting new patients
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. Billie Marek:

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Specialties & Research

Dr. Billie Marek, FACP, MD is board certified in Internal Medicine and Medical Oncology.

  • He has special expertise in 1 area:
  • Cancer

Education & Awards

Dr. Marek graduated from The University of Texas at San Antonio.


Dr. Marek has 3 hospital affiliations:

  • Valley Regional Medical Center 
  • Rio Grande Regional Hospital 
  • Mcallen Med. Ctr. 


  • Spanish

> > > > Dr. Billie Marek, FACP, MD

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Additional Information
Dr. Billie Joe Marek FACP and MD is a male Internist, has 28 years of experience and practices in Internal Medicine and Medical Oncology.
Where does Dr. Billie J. Marek practice?
Dr. Billie Marek has 2 office locations.
Dr. Billie Marek practices Internal Medicine and Medical Oncology near McAllen, TX.
Additional practice locations include: Brownsville, TX.
See McAllen Internists and McAllen Oncologists.