WSJ suggests company used questionable diagnoses to boost Medicare payments
                                
                                
                                    (Newser) -
                                    The Justice Department is investigating Medicare billing practices at UnitedHealth Group, the $400 billion company that owns the largest US health insurer, whose  CEO was gunned down  in early December. According to the  Wall Street Journal , a civil fraud investigation is examining whether the company recorded questionable diagnoses to trigger...