On 26 December 2003 he was chosen by the Holy Synod of the Russian Orthodox Church to be bishop of Yegoryevsky and vicar of the Moscow diocese.
On 14 January 2004, in the Cathedral of Christ the Saviour, he was consecrated bishop of Yegoryevsky and vicar of the Moscow diocese, he was also bestowed his apostolic name Mark by then Metropolitan Kirill (Gundyaev) of Smolensk and Kaliningrad, later Patriarch Kirill of Moscow.
On 11 February 2009 he was appointed by Patriarch Kirill as temporarily chairman of the Department of external church relations.
On 31 March 2009 the Holy Synod decided to appoint Mark (Golovkov) secretary of the Moscow Patriarchate for foreign institutions.
He was also entrusted with the interim administration of the Russian Orthodox dioceses of Vienna-Austria and Budapest-Hungary.

From 16 July 2013 to 22 October 2015 Mark (Golovkov) served as the metropolitan archbishop of the Patriarchal parishes in Italy.
He was succeeded by Anthony (Sevryuk) on 26 October 2015.

On 26 February 2019 Mark (Golovkov) was replaced by Ignatius (Deputatov) in the patriarchal administration of the Russian Orthodox church.
Along with the resignation of the metropolitan of St. Petersburg, this was seen by some observers and journalists as part of an ongoing trend of Kirill removing old bishops mostly ordained and appointed by his predecessor and replacing them with younger bishops who reflect his personality and views.

On August 30, 2019, by the decision of the Holy Synod, he was appointed ruling hierarch of the diocese of Budapest Hungary with the title "Metropolitan of Budapest and Hungarу" within the specified diocese.
On 26 December 2003 he was chosen by the Holy Synod of the Russian Orthodox Church to be bishop of Yegoryevsky and vicar of the Moscow diocese. On 14 January 2004, in the Cathedral of Christ the Saviour, he was consecrated bishop of Yegoryevsky and vicar of the Moscow diocese, he was also bestowed his apostolic name Mark by then Metropolitan Kirill (Gundyaev) of Smolensk and Kaliningrad, later Patriarch Kirill of Moscow. On 11 February 2009 he was appointed by Patriarch Kirill as temporarily chairman of the Department of external church relations. On 31 March 2009 the Holy Synod decided to appoint Mark (Golovkov) secretary of the Moscow Patriarchate for foreign institutions. He was also entrusted with the interim administration of the Russian Orthodox dioceses of Vienna-Austria and Budapest-Hungary.
From 16 July 2013 to 22 October 2015 Mark (Golovkov) served as the metropolitan archbishop of the Patriarchal parishes in Italy. He was succeeded by Anthony (Sevryuk) on 26 October 2015.
On 26 February 2019 Mark (Golovkov) was replaced by Ignatius (Deputatov) in the patriarchal administration of the Russian Orthodox church. Along with the resignation of the metropolitan of St. Petersburg, this was seen by some observers and journalists as part of an ongoing trend of Kirill removing old bishops mostly ordained and appointed by his predecessor and replacing them with younger bishops who reflect his personality and views.
On August 30, 2019, by the decision of the Holy Synod, he was appointed ruling hierarch of the diocese of Budapest Hungary with the title "Metropolitan of Budapest and Hungarу" within the specified diocese.
Mark (Golovkov)