Why Change Healthcare's restoration process has taken so long

From Modern Healthcare:

UnitedHealth Group has said it's taken a prioritized approach to bringing systems back online by first focusing on pharmacy processing, medical claims and payment systems, with ancillary service restoration still in progress. As of May 2, one-third of the 28 platforms catalogued on Change Healthcare's status website are marked as uninterrupted or fully restored, about half are partially available, five are in progress, and one is pending a restoration date.

Witty told the Senate Finance Committee Wednesday that core systems are back to normal. In a statement submitted to the committee, the American Medical Association disagreed with the assertion, citing a survey of members from April 19 to April 24.