Horace J. Clark founded Diversified Data Design Corp. (DDD) in 1974 to provide patient accounting and reporting services for medical groups and hospital-based specialists. Horace left DDD to become Executive Vice President and Chief Information Officer for Maxicare, one of the nation’s first health plans to embrace the IPA delivery system. Subsequently, he was hired to run Quatro, an eligibility and payment system for the healthcare division of American Express. In 1989, Horace returned to DDD, transforming the business from providing billing and financial services to a company dedicated to capturing capitated encounter data for California’s delegated marketplace. Horace has supported projects and programs associated with the National Health Foundation, California Health Care Foundation, Workgroup on Electronic Data Interchange, and American National Standards Institute, as well as quality reporting initiatives such as National Committee on Quality Assurance’s Health Plan Employer Data Set (HEDIS) and the Integrated Healthcare Association’s Pay for Performance (P4P). Horace received Bachelor of Science degrees in Mathematics/Logic (1965), Accounting (1967), and Quantitative Business Analysis (1970) from the University of Southern California, graduating Magna Cum Laude. Additionally, he has served as a lecturer and instructor to the graduate programs in business and public health at UCLA and USC.