Valley Health Lab Services - Martinsburg Address 1804 W. King Street Martinsburg, WV 25401 Phone (304) 901-5160 Hours of Operation Monday - Friday 8 a.m. to 4:30 p.m. Get Directions Latitude new Valley Health Lab Services - Martinsburg Address 1804 W. King Street Martinsburg, WV 25401 Phone (304) 901-5160