Medicare Patient Empowerment Act of 2013 - Amends title XVIII (Medicare) of the Social Security Act to allow any Medicare beneficiary to enter into a contract with an eligible professional for any item or service covered by Medicare. Allows such beneficiaries to submit a claim for Medicare payment in the amount that would otherwise apply if the claim had been filed by a participating physician or supplier in the payment area where the eligible professional covered by the contract resides.

Requires a Medicare beneficiary to agree in writing in such a contract to: (1) pay the physician or practitioner for a Medicare-covered item or service; and (2) submit (in lieu of the physician or practitioner) a claim for Medicare payment. Allows a beneficiary, however, to negotiate, as a term of the contract, for the eligible professional to file such claims on the beneficiary's behalf.

Preempts state laws from limiting the amount of charges for physician and practitioner services for which Medicare payment is made.