Hattiesburg, MS 39402. Regular Hours: Mon - Fri: 7am-4pm. After Hours: Weekdays: 4-7 pm (walk-in's accepted all day) Sat: 8am-12 noon . Sun: 12pm-4pm. Appointments and walk-ins are seen during regular business hours. Walk-ins only are seen during the extended After Hours. West Clinic: Family Practice Clinic West, (Dr. Lowe and Dr. Hibbets ).