There are situations where coders can do coding from home, but those are fewer and farther between. Most billing companies want their employees to come to their office, so working from home in this situation is also limited. I'm not saying you can't find this type of work, but it's going to be more difficult.
Most people that want to work from home start their own business providing billing, coding and consulting services and then market their business to healthcare providers.
If you are interested in networking with these types of billers/coders, the AMBA is geared specifically to work with smaller companies and small doctor's offices.
We do have a job board and from time to time there are job listings on it for home billers, but mostly, these are coding and billing positions that require a physical presence. However, networking with other small, independent billers occasionally nets home jobs. Our members often do work for each other or share resources.
One thing you have to do though is be disciplined to work from home. Not everyone can do it. It takes the right person to make home and working from home work out.