.....in advance of my mediation?
Medicare liens are obviously an important part of preparing for your mediation. Since it will likely take up time at the mediation, perhaps at a time and in a way that will derail the settlement, it is a good idea to discuss what information is needed and how the parties anticipate dealing with these liens in advance.
Certainly, too, it is a good idea to share your understanding of recent relevant case law as it is a dynamic area. On that note,
Wright v. Liberty Medical Supply, Inc., 2011 U.S. District Court, Civil Action No. 7:09-cv-02490-JMC (District of South Carolina, Spartanburg Division., July 25, 2011); and
Schexnayder v. Scottsdale Insurance Co., 2011 U.S. District Court, Civil Action No. 6:09-cv-1390 (W.D. La., July 28, 2011); are two relatively recent Federal Court cases you may find of interest. You may want to consider employing the services of a dedicated Medicare compliance adviser to help you keep up-to-date and to help you decide how best to approach dealing with lien issues.