Medicare Audits Show Problems in Private Plans

By ROBERT PEAR

WASHINGTON, Oct. 6 — Tens of thousands of Medicare recipients have been victims of deceptive sales tactics and had claims improperly denied by private insurers that run the system’s huge new drug benefit program and offer other private insurance options encouraged by the Bush administration, a review of scores of federal audits has found.

The problems, described in 91 audit reports reviewed by The New York Times, include the improper termination of coverage for people with H.I.V. and AIDS, huge backlogs of claims and complaints, and a failure to answer telephone calls from consumers, doctors and drugstores.