Purchasing Empowered. With 20 years of experience, Provista is a leader in the supply chain industry. Our extensive product coverage and billions in purchasing power connect customers to the best contracts from the most sought-after suppliers in the nation. But we go beyond contracts. We provide customized purchasing solutions ã Data and Analytics, Contract Implementation, Management Tools, Savings Programs and Business Reviews and Reports ã to a multitude of industries including surgical, extended, diagnostic and preventive care facilities and businesses of all sizes.