Dr Rizvi is one of Pakistan’s leading humanitarians, having established the largest free health organization in Pakistan. He works as a doctor and an administrator at SIUT in Karachi, which was founded in 1971 as an eight-bed unit but is now the largest health organization in Pakistan. SIUT provides free and comprehensive services in urology, nephrology, transplantation, and liver-related diseases. He is the recipient of many awards for his life’s work.