KFF Health News Nov 1 2024 Maria Sanchez immigrated to the Chicago area from Mexico about 30 years ago. Now 87, she's still living in the U.S. without authorization. Like many longtime immigrants, she has worked — and paid taxes, including Medicare taxes — all that time. But Sanchez never had health insurance, and when she turned 65, she couldn't enroll in Medicare. She has never had preventive care or screenings. No physicals. No cholesterol checks. No mammograms. "Nada, nada, nada," she said