Testing Locations » Wisconsin » Wausau WI » Emsi-Wausau – Emsi-Wausau – Drug Testing Only (Preferred) Emsi-Wausau – Emsi-Wausau – Drug Testing Only (Preferred) Emsi-Wausau – Emsi-Wausau – Drug Testing Only (Preferred)209 W Washington StSte 103Wausau, WI 54403-5475 United States appointment requiredrnclose at 2:30pm on Fridays in June, July and August