 Playbook User Key  Important Information about Playbook  Three Themes  All About Insurance /Intro to COB Refreshers  Defining Common Terminologies  Three Ways to Become Entitled to Medicare  Waiting Period for ESRD Entitlement  Determining Three Month Waiting Period  Determining the Initial Medicare Entitlement Reason  Helpful Hints Before Digging Deeper into COB  Incarceration  COB Four-Step Process  Applying COB Formulas  Determining Date of Retirement  COB Rules for Multiple Commercial Carriers  Special Circumstances that Affect COB  COB Reference Chart  Words of Wisdom  Helpful Links 3 5 6 7 8 12 13 14 15 16 17 18 20 23 24 25 27 32 34