Assure Access to Mammography Act of 2003

Assure Access to Mammography Act of 2003 - Provides that, with respect to payment for a screening or diagnostic mammography furnished to a Medicare beneficiary, the amount of payment made to a hospital-based facility in which such screening or diagnostic mammography is performed during the applicable period is equal to 200 percent of the amount of payment that would otherwise apply under the Medicare fee schedule established under title XVIII of the Social Security Act with respect to the technical component of such screening or diagnostic mammography. Provides for not counting certain radiological residents against graduate medical education limitations.

Directs the Secretary of Health and Human Services to enter into an arrangement with the Institute of Medicine of the National Academy of Sciences to study and report to the Secretary on Medicare reimbursement for gender-specific services.

Directs the Medicare Payment Advisory Commission to study and report to Congress on Medicare reimbursement for screening services.