Medicare Access to Critical Medications Act of 2007

Medicare Access to Critical Medications Act of 2007 - Amends part D (Voluntary Prescription Drug Benefit Program) of title XVIII (Medicare) of the Social Security Act to require prescription drug plan (PDP) formularies to include all or substantially all covered part D drugs in the therapeutic classes: (1) anticonvulsants; (2) antineoplastics; (3) antiretrovirals; (4) antidepressants; (5) antipsychotics; and (6) immunosuppressants.

Prohibits the application of a utilization management tool, such as prior authorization or step therapy, to such drugs in certain cases.

Prescribes requirements for treatment of such drugs when a determination or reconsideration is requested, as well as the treatment of appeals for such drugs.

Establishes data reporting requirements for such drug categories and classes.