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