Testing Locations » Washington DC » Washington DC » Northside Medical Services, Corp – Northside Medical Services, Corp – Drug Testing Only (Preferred) Northside Medical Services, Corp – Northside Medical Services, Corp – Drug Testing Only (Preferred) Northside Medical Services, Corp – Northside Medical Services, Corp – Drug Testing Only (Preferred)4121 Minnesota Ave, NeWashington, DC 20019-3572 United States Hair testing is by appointment only.rnSat/Sun for emergencies only.
