Federal regulators have stopped Cigna from enrolling new Medicare customers until the health insurer deals with problems that have triggered care denials or delays and higher costs for some people. The insurer, which is being acquired by the Blue Cross-Blue Shield carrier Anthem, has a “longstanding history” of not complying with requirements from the Centers for Medicare and Medicaid Services, or CMS, according to a 12-page letter the agency sent to Cigna earlier this week.
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