The idea that America lacks behind in basic necessities, is absurd. As such a rich nation to have so little investment in its individuals is a cause for concern. Health is the foundation of a thriving society. Luckily the internet and technology make it easier, to make hard to access services more accessible or even sometimes free. This creates a unique opportunity to impact a wide range of people by building a single product. Specifically around the idea of free healthcare or free counseling via a web-app.
There are three areas to think about to get started as far as solving this problem. Each has a different area of focus but still would help a wide range of people. Each option is labeled with its difficulty value.
What's hard isn't necessarily building the product. It's understanding the economics around the product, and finding sustainable ways to generate revenue.