Northwest Health - Portage. 3630 Willowcreek Rd Portage, IN 46368 (219) 364-3000. Directions; Northwest Health - Chesterton provides Urgent Care, family practice providers, laboratory services and physical and occupational therapy.. Urgent Care Hours: Monday - Sunday: 9 a.m. to 9 p.m. Outpatient Lab Hours: Monday - Friday: 8 a.m. to 6:30 p.m. and Saturday 8 a.m. to 12 p.m..