COB Playbook

COB Reference Chart 2015

Regular Chronic Dialysis Began (RCBD) / First Date of Dialysis Ever (FDODE)

3 Month waiting period + 30 month COB period = date Medicare is primary

No waiting period + 30 month COB period = date Medicare is primary

Renal Chronic Dialysis Began (month and year)

January

2015

July 1

2017

October 1

2017

February

2015

August 1

2017 November 1

2017

March

2015 September 1

2017 December 1

2017

April

2015

October 1

2017

January 1

2018

May

2015 November 1

2017

February 1

2018

June

2015 December 1

2017

March 1

2018

July

2015

January 1

2018

April 1

2018

August

2015

February 1

2018

May 1

2018

September

2015

March 1

2018

June 1

2018

October

2015

April 1

2018

July 1

2018

November

2015

May 1

2018

August 1

2018

December

2015

June 1

2018 September 1

2018

For a complete Reference Chart for dates from January 2005 – December 2021 , click here