SECAUCUS, N.J., Dec. 19, 2025 /PRNewswire/ -- Quest Diagnostics Incorporated (NYSE: DGX), a leading national provider of diagnostic information services, announced that Jim Davis, Chairman, CEO and President, and Sam Samad, Executive Vice President and Chief Financial Officer, will speak on the company's strategy, performance, and the latest market developments and trends during a presentation and Q&A session at the 44th Annual J.P. Morgan Healthcare Conference in San Francisco on Monday, January 12, 2026, ...