HC Reform Update from Mark Sanna: Five of the nation's largest health insurance companies are taking a key step toward building their own inside-the-Beltway coalition to influence implementation of the new health law and congressional efforts to change it. The companies – Aetna, Cigna, Humana, UnitedHealthcare and Wellpoint – are shopping around Washington for a public relations firm to represent them, according to a source familiar with their work. Public Strategies and APCO are among PR firms that have spoken with the insurers.