The 61-year-old rocker - who has an ongoing alcohol problem and reportedly faced being axed from The Rolling Stones after he fell off the wagon last summer - is alcohol-free, according to one-time Faces bandmate Ian McLagan.
Keyboard player Ian - who has been in contact with Ronnie about a possible reunion - said: "Ronnie is in great shape and good spirits. He's not currently drinking."
"He slips but he stops. He's finding his grace, and it's a struggle. He's trying really hard."
According to reports, Ronnie was warned he risked being dropped from a proposed autumn tour of America by his Rolling Stones bandmates Mick Jagger, Keith Richards and Charlie Watts.
A source explained: "All the band have to have a compulsory pre-tour medical to make sure they can get insurance."
"Ronnie failed his medical for the 2002/2003 tour because he was drinking seven times the recommended number of alcohol units a week."
"He had to spend months drying out at a clinic in Arizona. There are worries that could be the case again this time."
Ronnie was most recently treated for his alcohol addiction last August at the Life Works clinic in Surrey, England, following a 10-day drinking binge in Ireland with Russian girlfriend Ekaterina Ivanova, 20.
