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Internist, Oncology Specialist (cancer)
42 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. Efrain Casas:

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Specialties & Research

Dr. Efrain Casas, MD is board certified in Internal Medicine and Medical Oncology.

  • He has special expertise in 3 areas:
  • Breast Cancer
  • Gastrointestinal Cancer
  • Lung Cancer

Education & Awards

Dr. Casas graduated from Universidad Nacional De Colombia, Santa Fe De Bogota.


  • Spanish

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Additional Information
Dr. Efrain Rafael Casas MD is a male Internist, has 42 years of experience and practices in Internal Medicine and Medical Oncology.
Where does Dr. Efrain R. Casas practice?
Dr. Efrain Casas has 3 office locations.
Dr. Efrain Casas practices Internal Medicine and Medical Oncology near Clinton Township, MI.
Additional practice locations include: Detroit, MI and Grosse Pointe, MI.
See Clinton Township Internists and Clinton Township Oncologists.