What is the Maximum of of pocket mean in a Medicare Advantage Plan ?

Most Medicare Advantage Plan's have a maximum out of pocket or (MOOP) which is the total amount you will spend in a year on co-payments, and co-insurance for covered medical expenses. When the MOOP limit is reached the Medicare Advantage plans covered expenses are at no cost to the beneficiary. Keep in mind that if the Advantage plan is a HMO or POS, the expenses paid to non network providers do not count toward the MOOP limit 
the same goes for Prescription Drug coverages the co-payments for Prescription Drugs within the plan do not count toward the MOOP limit.

Medicare Advantage plans can change the MOOP limit yearly, the good news is that Medicare sets a limit on the MOOP limit for all Advantage Plans.