Johnson, 65, is the former guitarist with 1970s British rock band Dr. Feelgood. He also plays a recurring role on the HBO fantasy series, "Game of Thrones."
He plans to finish a new CD, tour France and perform a series of farewell shows in the United Kingdom while he is still able, the BBC said Thursday.
"He is not yet suffering any physical effects and can expect to enjoy at least another few months of reasonable health and activity," his manager Robert Hoy wrote on Johnson's Facebook page.
"Wilko wishes to offer his sincere thanks for all the support he has had over his long career," Hoy said. "From those who have worked with him to, above all, those devoted fans and admirers who have attended his live gigs, bought his recordings and generally made his life such an extraordinarily full and eventful experience."