Which Medigap Plan Is Most Popular? 
By far the most popular plan is Medigap plan F . It is the easiest to explain , has the highest premium and agents make the most commission on plan F. Medigap plan F has no moving parts . It pays 100 % of Medicare approved Part A and B expenses not paid by Medicare due to deductibles and coinsurance . So why do over 90 % of my clients have something OTHER THAN plan F ? They are educated on the differences . 