Reptiukh became a Paralympic champion in the men's 20 km race among athletes with lesions of the musculoskeletal system.
Ukraine’s Serhiy Romaniuk finished seventh in that discipline.
For Ihor Reptiukh, it is the second medal in Pyeongchang. Earlier, he won bronze in the men's 7.5 km race.
The Ukrainian athletes have already brought seven medals - three gold medals, one silver, and three bronze medals.
The 2018 Paralympic Winter Games will last till March 2018.