Johnson had been the pre-tournament favourite until suffering a freak injury at home on Wednesday night.
The world No1 drove to Augusta the next day and attempted to take part in the tournament but walked off the first tee with his back hampering his ability to swing the club.
However, the 32-year-old has successfully teed off at the Wells Fargo Championship in North Carolina although he admitted yesterday that fans should not expect his immediate return to the top of the leaderboard.
“I’m good to go,” said Johnson.
“I haven’t practised much the last few weeks.
“Obviously I had to rest and it was sore for a while – a lot longer than I thought it would be.
“I don’t really have many expectations but I’m feeling good.
“I feel like I am swinging really well so we’ll just have to see what happens.”
In Johnson’s absence, Sergio Garcia beat Justin Rose in a playoff to win the Masters, his first ever major triumph after 73 failures.
And Johnson, who had run three tournaments on the bounce ahead of the Augusta competition, said it made far from easy viewing.
“It was tough to watch [the Masters] but I couldn’t do anything else – I was still laying on the couch,” Johnson added.
“I wanted to be there playing.
“I was playing the best golf of my career leading into the Masters so I didn’t want to watch it on TV, but things happen and I’m back out here playing now.”