Anesthesiologists, nurse anesthetists and anesthesiologist assistants who last validated their enrollment in Medicare prior to March 25, 2011 are going to have to revalidate again by March 23, 2013. The revalidation is required under Section 6028 of the Affordable Care Act.  According to this statutory provision, all providers and suppliers who were initially enrolled before March 25, 2011 and have not revalidated since then must revalidate their enrollment information within 60 days of receiving notice from their carriers, but no later than March 23, 2013.This is a hassle for physicians and allied health professionals who enrolled or revalidated as Medicare providers in 2009, 2010 or up until March 22nd of this year.  Normally, providers have five years to revalidate.   It may be of modest consolation that the burden will be considerably greater for institutional providers and especially for suppliers.  That is because the revalidation is intended to combat Medicare fraud, by bringing...