The 51-year-old also tagged Johnson and Candace Parker, his fellow TNT commentators, in the tweet writing, "Miss y'all."
"Love ya big Fella," Parker said in response to the tweet.
Prior to the hospital photo, Shaq tweeted at Parker directly, referencing her newscast with Johnson from that night: "BARBECUE CHICKEN ALERT BARBECUE CHICKEN ALERT," after Parker used the phrase on-air.
The tweet earned an on-screen mention during TNT's March Madness coverage on Sunday, with Johnson editorializing, "Shaq's got a little time on his hands!" before wishing him the best in his recovery.