St. Agnes Hospital in Baltimore is one of the 131 hospitals run by Ascension Health. It's a not-for-profit, Catholic health care system that treats many low-income patients. St. Agnes Hospital hide caption

itoggle caption St. Agnes Hospital

Anne Koller closes her eyes as an oncology nurse attaches a line for chemotherapy to a port in her chest. Koller typically spends three to six hours getting each treatment. Sarah Jane Tribble/WCPN hide caption

itoggle caption Sarah Jane Tribble/WCPN

Depending on the amount taken in subsidies, or changes in reported income and family status, some Obamacare policyholders this year will get a bigger refund than expected and others will owe more in taxes. Carolyn Kaster/AP hide caption

itoggle caption Carolyn Kaster/AP

Mental health care advocates say patients face challenges in insurance coverage. iStockphoto hide caption

itoggle caption iStockphoto

Tax preparation software doesn't always calculate the complexity of Affordable Care Act subsidies and credits properly. Daniel Acker/Bloomberg via Getty Images hide caption

itoggle caption Daniel Acker/Bloomberg via Getty Images