Is there a new geoid model available?

Question:Is there a new geoid model available?

Is there a newer geoid model available than the 99 and 03 that we have been using?

Answer: 

Yes, the GEOID09 is a refined hybrid model of the geoid in the United States and other territories, which supersedes the previous models GEOID06, GEOID03, GEOID99, GEOID96, GEOID93, and GEOID90.