The New Hampshire Comprehensive Health Care Information System (CHIS) was created by NH state statute to make health care data "available as a resource for insurers, employers, providers, purchasers of health care, and state agencies to continuously review health care utilization, expenditures, and performance in New Hampshire and to enhance the ability of New Hampshire consumers and employers to make informed and cost-effective health care choices." The statute also required that the New Hampshire Insurance Department (NHID) and the NH Department of Health and Human Services (NH DHHS) partner on the project. The same legislation that created the CHIS also enacted statutes that mandated that health insurance carriers submit their encrypted health care claims data and Health Employer Data and Information Set (HEDIS) data to the state.
NH DHHS, Office of Medicaid Business and Policy, after a competitive bid process, contracted with Milliman in June 2012 to assume maintenance of the CHIS. Under the contract, Milliman is acting as DHHS's agent for the collection of claims data and hosting this website.