Medical emergency at Mercy Medical Building in Hazelwood Heard on: St. Louis County Fire and EMS - North 00:14 00:00 4127, medical facility EMS call. Transcript This transcript is auto-generated from live dispatch audio and may be incomplete or inaccurate. It is not an official report and may change. 00:00 4127, medical facility EMS call. 00:04 Mercy Medical Building, (number withheld) Hazelcrest Drive. 00:09 Cross street is Dunn Road. 00:11 4127, respond on North Main. 7/30/2026 11:29 AM Medical Emergency Hazelcrest Dr, Hazelwood, MO 63042 View on map