Filemaker add-in for electronic billing and prescribing

We have been using filemaker for over 7 years, we are very happy with it.
Our company has grown and we are looking for a method of integrating electronic prescription and electronic billing for our current database.
The add-in we require needs to be HIPPA compliant.  Changed in healthcare has pushed us to look into this new method. There are software out there that does dispensing, e-billing, and e-prescriptions, but those software companies are not flexible in providing us specific needs. They mention their dispensing software with those "e" features is a package software. That they can not modify it or simply add an additional field into their program.  They would want us to use a work-around. We do not want that. Since we have our database with inventory and all information pertaining to our patients, we would rather build the code to create a dispensing layout similar to their software.  We do not want to have to export our data into a new database for dispensing, so we rather keep it in-house.  What I am looking for has anyone of you used or know of a add-in module for our current database so we can use the features of -ebilling and e-prescribing.  I did notice there is an add-on for scanning via laser gun, that will be helpful. With that scanning feature, we would like to know if there is a database of products library on the net we can use to download(healthcare based) and import into our database?