While Mylan is not implicated in the other cases, the inquiry into its access programs runs parallel to a number of federal investigations into pharma's patient assistance ties. Drugmakers including Gilead ( $GILD ), Biogen ( $BIIB ), Jazz ( $JAZZ ) and Celgene ( $CELG ) have been thrust into the Justice Department's spotlight in recent months as prosecutors probe their relationships with patient assistance charities. Before that, Questcor drew fire for its links with the Chronic Disease Fund, and the CDF replaced its administrators afterward.