The post Medicare Doesn’t Cover This $129,000-a-Year Retirement Expense, and Most Find Out Too Late appeared first on 24/7 Wall St.. A 72-year-old widow is reviewing her mother’s nursing home bill for the third month in a row. Medicare covered the first 20 days in full, then paid its share of days 21 through 100 while the family owed a $217-a-day coinsurance for that stretch. Her mother had been admitted for skilled rehabilitation after a hospit…