To whom it may concern: I have been using Medclaims for one year and I would like to say that I have never had a billing service with such recovery of funds, persistence and professionalism. Sofia and Luis have such integrity, and I trust each decision they make. Follow-up on claims is essential in the billing business, and Sofia is a hawk, with the temperament of a dove. Not one thing skips her expert eyes. We will continue our professional relationship with Medclaims for many years to come.