The incident occurred in the 23rd minute when Farah attempted to pressure a kick from Canterbury five-eighth Josh Reynolds.
Farah's head appeared to make contact with Reynolds's hip before the 32-year-old's head slammed into the ANZ Stadium turf.
Play was stopped for eight minutes with medical staff from both clubs monitoring his wellbeing before he was stretchered from the field to a rousing round of applause from the 20,936 fans in attendance.
Club officials said Farah was conscious and moving and it is believed he was sent to hospital shortly after half-time.
Wests Tigers coach Jason Taylor provided an update on the health of the club's former skipper in the post-match media conference.
"Robbie's OK. He had a bit of pain in his neck which is why he's gone to hospital, but the doctor says it's just precautionary. He was in good spirits when he left so we're confident that he'll be fine," Taylor explained.
"It was pretty clear that it was serious and we were all concerned about him, but as I say, it's precautionary. We don't know 100 per cent one way or the other but he's confident that he'll be fine."
Returning skipper Aaron Woods said it was tough to see his teammate in that position but refused to use the incident as an excuse for his side's 32-point loss, instead blaming poor execution for the defeat.
"The poor bloke was pretty severely hurt. I didn't watch the replay but I really felt sorry for Robbie when I saw him laying on the ground," Woods said.
"We've got to be better than that. We slackened off. The boys started OK but we weren't there today.
"We're a first grade outfit. Dene Halatau came on and filled the job. He's been there a couple of times this year already when Robbie was injured at the start of the year.
"We let ourselves down with little things we practised all week. We didn't execute well enough in attack and defence today."
Canterbury captain James Graham admitted the incident was a delicate one to handle.
"It's always a strange one when you've got a stoppage like that," the Englishman said.
"I guess it's hard unless you're out there to explain what it's like really. Obviously you're concerned about the player's welfare but at the same time you've got to keep switched on with another job to do."