TWO doctors were struck off the medical register for three years yesterday for plotting with other doctors to defraud the Government of nearly $19 million. David Chow Siu-shek, 44, and King Ho You-sang, 58, were released from jail earlier this year after serving two years for the offence. They were also fined $1 million each. The Medical Council heard that in the mid-1980s, the pair had produced fake documents on the number of pupils they served in a student health scheme. Chow and Ho were members of the School Medical Service Board, which managed the School Medical Services Scheme. The scheme allowed doctors to claim $65 from the Government every year for each student registered with them. The pair were found guilty in the High Court in 1990 of organising a group of doctors and getting student lists from schools to inflate the number of participants to claim fees for services they never gave. They had defrauded $18.7 million during the three school years from 1985 to 1988. Chow's counsel Colin Cohen said Chow had served the jail sentence and been fined, and had therefore suffered a lot. Ho said he had not intended to cheat the Government and he believed his way of running the scheme was the most efficient. He said: ''My objective was to maintain a viable school medical service scheme under my control and I did not realise my conduct could be viewed as villainous.'' Both of them were given one month to appeal but Ho said last night he would give up. Mr Cohen said Chow would not comment. The School Medical Services Scheme has been modified and parents are allowed to choose doctors from a government list.