ROCKPORT — Pen Bay Medical Center’s Walk-in Care practice will be closed Thursday, Sept. 15. It will resume regular hours Friday, Sept. 16. PBMC Walk-in Care is located at 22 White St. in Rockland. Its regular hours are 8 a.m. to 6 p.m., seven days a week. For more information about PBMC Walk-in Care, visit pbmc.org/walkin or call 301-6000.