Frische Nehrung
During World War II Mühlpfordt served as a physician (Stabsarzt and Oberstabsarzt) in the Wehrmacht from 1939 until his discharge for health reasons in 1944. From January 1945 until April he tended to refugees in Pillau (Baltiysk) and the Vistula Spit during the evacuation of East Prussia. On 16 April he took a refugee transport to Wismar. He settled in Lübeck, where he maintained his practice until 1959.