The surgery, which will take place in New York, will force Conlon to miss scheduled performances at the
Diverticulitis is a condition involving the inflammation or infection of parts of the digestive tract.
Conlon is expected to fully recover in time to conduct Britten's "A Midsummer Night's Dream" at the Metropolitan Opera in New York in October. His next scheduled L.A. Opera appearance will be conducting a production of Verdi's "Falstaff" in November.
The canceled La Jolla appearance was to feature the SummerFest Chamber Orchestra performing Britten's Simple Symphony and Prelude and Fugue. The program was part of L.A. Opera's Britten100/LA Festival, honoring the centenary of Britten's birth.