You may want to try policy consulting firms that offer "Hotline" services to pharma companies. They often need analysts to answer questions on how to code products, procedures, etc.
The company I just left runs a Helpline for Imaging Reimbursement (MRI, CT, etc)through the consulting company I now work for - all of the analysts are CPCs and all work from home. They get some extremely intricate coding questions about MR and CT procedures in hospital and freestanding settings. I am in a different division but am working from home, too. We have several CPCs on staff where I am as well.
You could try Lash, Parexel, TheraCom, Covance and see what's available. I have worked for or with each of these companies and it is an interesting way to put your coding knowledge to work!
With all the changes in radiology reimbursement lately, you may even find that your expertise would be welcome at an insurer or a radiology benefit management company (Care Core, MedSolutions, etc, etc).
Best of luck.