as a physician and member of the AMA, i would agree that obsessive video game playing can cause disruption in a individual's life and tends to exist as a component of behavioral issues - not a distinct mental disease by itself. i would be surprised if this would truly get classification as a mental disorder and placed in the DSM V to be released in 2011 or 2012.
(more on the DSM http://en.wikipedia....ental_Disorders
the classification would allow diagnosis and treatment for this problem to be covered by health insurance more directly, but i would suggest that one could still get coverage by grouping video game playing as symptoms manifested through another behavioral or personality disorder.
that online gamers anonymous web page did look interesting.http://www.olganonboard.org/
as with anything in life - one must be careful to practice moderation...