Korobeinikov was born on July 10, 1986, in the Moscow suburb of Dolgoprudny. He took up the piano at five, and two years later, he took a first prize at a regional Tchaikovsky International Piano Competition for Young Musicians. At eight, he made his recital debut in the Great Hall of the Baku State Academy of Music in Azerbaijan. The Tchaikovsky Competition nod was just the first of more than 20 prizes Korobeinikov would win in competitions both in Russia and beyond. These included the Alexander Scriabin International Piano Competition in Moscow in 2004 and the Sergei Rachmaninov International Piano Competition in Los Angeles in 2005. Korobeinikov attended the Tchaikovsky State Conservatory in Moscow, studying with Andrei Diev and graduating in 2006. He continued on for further studies with Diev and also studied with Vanessa Latarche at the Royal College of Music in London. Afterward, he followed a postgraduate course at the same conservatory with the same professor. Concurrently with these studies, he earned law degrees from the European University of Law JUSTO in Moscow (2003) and Lomonosov Moscow State University (2007). In 2008, he made his recording debut on the Challenge Classics label, backing violinist Charlie Siem on an album of sonatas by Elgar and Grieg. His solo debut, Scriabine, appeared the same year on the Mirare label.
Korobeinikov has been an international concert attraction, appearing in more than 40 countries. As a concerto soloist, he has appeared with some of the world's top orchestras, including the London Philharmonic, the Czech Philharmonic, and the NHK Symphony Orchestra in Tokyo, as well as with most major Russian orchestras. Korobeinikov has played chamber music with the Borodin String Quartet as well as various solo players, including Siem and cellist Johannes Moser. Korobeinikov has been a reliable draw at European festivals such as the Festival International de Piano de la Roque d'Antheron, the Festival de Radio France et Montpellier, and the White Nights Festival in St. Petersburg, among many others. He made several more recordings for Mirare and then moved to Onyx for an album of unusual chamber music by Myaskovsky and Taneyev, backing cellist Pavel Gomziakov. He returned on Onyx in 2022 with an album of Rachmaninov's piano trios, joined by Gomziakov and violinist Tatiana Samouil. He backed Moser that year on an album of Martinu's cello sonatas, and in 2023, he released an album of Prokofiev's Piano Concerto No. 2 in G minor, Op. 16, with the Ural Philharmonic Orchestra and conductor Dmitry Liss on the Fuga Libera label. ~ James Manheim, Rovi