Moyes had shown no coronavirus symptoms since their meeting and was told to stay home as a purely precautionary measure. The seven-day period of isolation since the meeting has passed and he has been cleared to leave his home.
Premier League matches were postponed until April 4 following Arteta’s and Chelsea forward Callum Hudson-Odoi’s positive test.
Clubs will now hold an emergency meeting on Thursday to establish plans for the remainder of the season.
Rush Green training ground remains closed and is undergoing a deep clean as the West Ham squad carry out individual training programmes to keep up their fitness levels.