View All Locations Go Back Salem Health Laboratory – Monmouth 512 Main St., Suite 300 Monmouth Oregon 97361 Phone: 503-814-5227 Monday, Tuesday, Thursday, and Friday — 8 a.m. to noon and 1 to 5 p.m.Wednesday, Saturday, and Sunday — CLOSED Services Lab services Walk-ins welcome.Additional services offered: Glucose tolerance testing (GTT) - by appointment onlyPhenylketonuria (PKU) testingUrine drug screening - (non-NIDA) collections Click here for a map of Salem Health Laboratory – Monmouth