United have lost back-to-back home games in the Geordie's absence.
"I do (feel United have felt Carrick's loss)," said Moyes.
"We need him for his creativity. We have missed him for lots of other reasons as well. It is important.
"We were looking for a couple of midfield players in the summer. We weren't able to get two. We got one.
"We needed one who could give us something else if we did get an injury to Michael or one who could have played with him. We have definitely been a little bit short in that area.
"Hopefully he is not too far away and he will be back in a couple of weeks."
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