The Maryland Board of Physicians, slammed in a recent legislative audit for its dysfunction, told a panel of lawmakers Wednesday that it could get on track in another year by hiring an outside consultant and instituting long-awaited guidelines. The chairman of the board, however, disputed that so much was wrong and noted several high profile actions it had taken in recent years, which include revoking the license of Mark G. Midei, a Towson cardiologist accused of placing unnecessary stents and suspending the license of Mark R. Geier, a Rockville doctor accused of mistreating children with autism.