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Houston Wellness Center

Houston Travel Vaccinations

HCID Careers

Patient Portal

*Notice: No shows will be subject to a $100 no show fee unless they cancel within 24 hours.

Travel Medicine

Office Hours

  • Monday to Friday
    8:00 A.M. to 5:00 P.M.

  • Infusion Clinic Only:
    Saturday and Sunday 8:00 A.M. to
    12:00 P.M

Houston Center for Infectious Diseases Nurse Practitioners


Hamilton Leonard Cessac

Hamilton Leonard Cessac is a board certified Family Nurse Practitioner. He graduated from the University of Texas Medical Branch with a Master's of Science in Nursing in April 2006. He graduated with a Bachelor of Science in Nursing from Florida State University in 1996. "Len" went on to work as a staff nurse in Emergency medicine for 10 years. During that time, he worked as a Travel Nurse in Maine, Georgia, Arizona, California, Florida and Texas.  Len worked as a Family Nurse Practitioner for an Internal Medicine practice before joining Houston Center for Infectious Diseases in July 2008, where his primary clinical interests include Sepsis/Bacteremia and post operative infections. He emphasizes the importance of listening to his patients and explaining their individual infection process in ways they can understand. He is married with 2 children and enjoys all outdoor activities, specifically; sports, flying and fishing. 







Houston Wellness Center

Houston Travel Vaccinations

HCID Careers

Patient Portal

*Notice: No shows will be subject to a $100 no show fee unless they cancel within 24 hours.

Travel Medicine

Office Hours

  • Monday to Friday
    8:00 A.M. to 5:00 P.M.

  • Infusion Clinic Only:
    Saturday and Sunday 8:00 A.M. to
    12:00 P.M