Washington manager Dave Martinez said Tuesday that Ross had opted for the surgery. The 29-year-old starter has been out since spring training with right elbow issues, and he exited a minor league rehab start last week with renewed soreness.
"He got different opinions, and they all came back to say that he needed surgery," Martinez said before a game against the New York Mets.
Ross was a member of the Nationals' 2019 championship team and appeared in two games during the World Series against Houston. Acquired as a minor leaguer in 2014 along with shortstop Trea Turner from San Diego, Ross is set to become a free agent for the first time this offseason.
Martinez had rosier news on injured starter Stephen Strasburg, who will make his first minor league rehab start with Triple-A Rochester on Friday. Strasburg has been out since last June following surgery for thoracic outlet syndrome.
The 33-year-old right-hander could return to the majors in the next couple of weeks, depending on how he feels at Triple-A.
"I can see the light at the end of the tunnel," Martinez said.
Star slugger Nelson Cruz was out of the Nationals' lineup with a left ankle contusion, but Martinez said he was available to pinch hit.
Minor league left-hander Evan Lee was in the Nationals' clubhouse and could make a spot start Wednesday against the Mets. It would be the 24-year-old's big league debut.