 The OCHAMPUS program led to the creation of the National Provider File (NPF), which was made available for commercial accounts in 1990 via Delta USA – providing Delta Dental coverage to organizations with employees and subscribers located in multiple states.If individuals have dental insurance through their employer, the Delta Dental member company in the state of their headquarters usually will handle coverage.Individual Delta Dental insurance is available in several states either through that state's member company or the state or federal health care exchange.