I agree with David. No one is more interested in your money than you. Knowing where it is and where it is not is critical. When I changed from a Dos-based billing system to a Windows one we did exactly what David suggested....we kept the old system until it was cleared out of old charges, either paid or written off, and entered all new charges in the new system. It was a little hectic at times but ended up working out with very few complications. After the old system went untouched for a year, a paper AR was printed out and stored and the system was ditched.
Leslie Hospital Employed Physician Who Misses The Old AC
"It's a good thing for a doctor to have prematurely grey hair and itching piles. It makes him appear to know more than he does and gives him an expression of concern which the patient interprets as being on his behalf. "