If I paid for a medical expense in 2011 and it's unexpectedly refunded in 2012, can I still deduct it on?

Do not deduct medical expenses of any kind for which you received a reimbursement. Similarly, if you receive a reimbursement from insurance in a subsequent year for an expense previously deducted, the reimbursement is included in your adjusted gross income in the year the reimbursement was received. Include the reimbursement on line 10 of Form 1040.