Ive been in the business since the great flood. As a coder and biller, I work from my home. I dont do it as my own business, I do so as an employee of my provider. I started working in the office. The doctor trusted me and said, rather than drive 600 miles one way, be away from my family for a week at a time, work out of my home. He picked up all of the costs to do my work. He pays the postage, for office supplies and for my internet. I am sent daily e-mails of things needed to be done along with scanned EOBs and correspondence.
I did have to go through the local requirements to work out of my home. That included a county certificate of occupancy. Register with the State Division of Corporations and an inspection by the local fire marshall. But these were local requirements and I work for other providers as a 1099 employee as a consultant and instructor. All of this may not be required where you live. At tax time, I get a W-2 form for taxes from the provider. All of the other clients I help send me a 1099 form and I end up paying Medicare and SSI taxes because the IRS says I own my own business, hence the red tape from the State and local folks. BUT, for my provider, I work for him out of my home as his employee. IT took 6 years to build up the trust to allow me to work from home.