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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. Crystal Cassidy:

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Specialties & Research

Dr. Crystal Cassidy, MD is board certified in Emergency Medicine.

Education & Awards

Dr. Cassidy graduated from The University of Texas at Houston.


Dr. Cassidy has 4 hospital affiliations:

  • Mhhs Hermann Hospital 
  • Memorial Herman Memorial City 

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Additional Information
Dr. Crystal Colleen Cassidy MD is a female Emergency Medicine Specialist, has 15 years of experience and practices in Emergency Medicine.
Where does Dr. Crystal C. Cassidy practice?
Dr. Crystal Cassidy has 3 office locations.
Dr. Crystal Cassidy practices Emergency Medicine near Houston, TX.
See Houston Emergency Physicians.