The Slovenian's bid to win the one Grand Tour that has eluded him was wiped out 30km from the end of stage eight from Pucol to Xeraco.
"This afternoon, Tadej underwent successful surgery on his left clavicle after receiving the all-clear to proceed with the operation," Adrian Rotunno, Medical Director for UAE Team Emirates-XRG, said in a statement.
"The procedure went well and he will remain in hospital for post-operative monitoring for a few days."
Pogacar's crash was a huge blow to the Vuelta, which he had led from the opening stage and looked set to dominate all the way to the finish in Granada.
It also leaves a huge question mark as to whether he can participate in the world road championships in Quebec at the end of September.
"When ready, Tadej will travel home to begin his recovery and rehabilitation under the supervision of the team's medical staff," Rotunno said. "We will continue to monitor his progress closely throughout the recovery process."
Pogacar won his fifth Tour de France last month and also won the Giro d'Italia in 2024 and was aiming to become the ninth rider to complete the hat-trick of cycling's Grand Tours.
(Reporting by Martyn HermanEditing by Toby Davis)

Slovenian rider Tadej Pogacar of team UAE Team Emirates XRG (R) wearing the overall leader's red jersey and British rider Oscar Onley of team Netcompany INEOS (L) wearing the youth leader's white jersey wait for the start to the 8th stage of the La Vuelta a Espana cycling tour, a race over 176.4km from Pucol to Xeraco, Spain, 29 August 2026. EPA/Javier Lizon
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