Dr. Warrier has founded Pratheeksha, an organization by cancer survivors to give psychological support to newly diagnosed cancer patients. His website www.oncologistindia.org gives information about cancer in a simplified manner. In 2003 he associated with MAX Foundation of the USAto provide free medicines for cancer patients and later started a drug bank for providing free chemotherapy drugs to cancer patients. He also organized a mass signature campaign along with other organizations and became instrumental in bringing out a ban on tobacco products in Kerala in 2014.
Dr. Warrier is trained from Adyar Cancer Institute, India and is the first medical oncologist in the Malabar Region. He is also the first to start a comprehensive cancer care in this part of Kerala.