Safeway grocery stores in Baltimore and across the nation are unable to process a popular Medicare Advantage payment card, leaving vulnerable populations looking for other options to buy healthy foods and over-the-counter medications, WYPR has learned.Albertsons, the parent company of Safeway, says it will not be able to process UnitedHealthCare Ucards until Feb. 1.The Ucards are part of the Medicare Advantage package offered by UnitedHealthCare and allow people to buy medication, food and pay for home utilities.Read more at WYPR.