Brazilian sustained shoulder injury against Swansea City.
The midfielder will have surgical stabilisation on the AC joint in his shoulder.
It means the Brazilian will miss several league games plus Manchester United's trip to Old Trafford in the Capital One Cup next Wednesday. He will miss league games against Southampton, Sunderland, Crystal Palace and Newcastle.
The club hopes he can return in time to for West Bromwich Albion's visit to Anfield on 26th October, before they face a challenging month in November, a month which includes a visit to Arsenal and the Merseyside derby at Goodison Park.
It means that Luis Alberto or Iago Aspas could take Coutinho's starting spot in what is a blow to Brendan Rodgers' after Liverpool have made a positive start to the Premier League season which sees them top of the table with 10 points.
image: © Dean Jones