KDOC-FM (103.9 MHz; "Fun 104") is a radio station broadcasting a classic hits format, simulcasting KFNL-FM in Spring Valley, Minnesota.

On March 23, 2010, the station changed its call letters to KDCZ and began simulcasting KDZZ.

On August 30, 2013, a deal was announced in which Townsquare would acquire 53 Cumulus Media stations, including KDZZ/KDCZ, for $238 million.

On April 13, 2017, at 7:30 a.m., KDCZ split from its simulcast with KDZZ and changed its format to adult hits, branded as "103.9 The Doc".

On September 10, 2021, KDOC-FM flipped to a simulcast of classic hits-formatted sister station KFNL-FM, branded as "Fun 104".