On April 15, CMS published a final rule codifying and clarifying current Medicare Part D prescription drug benefit policies. Among other things, the rule addresses policies relating to: coverage of certain insulin administration supplies; noncoverage of drugs used to treat sexual or erectile dysfunction; payment for vaccine administration; plan reconciliation with other plans or payers; and actuarial equivalence under the retiree drug subsidy program. The rule also establishes new standards regarding the timely delivery of Part D infusible drugs, modifies the retiree drug subsidy regulations, and makes other technical corrections and clarifications. The rule is effective June 9, 2008.