The season 2002/03 was the 65th regular season of the National League A . The HC Lugano was in the play-off -Final against HC Davos Swiss champion . The EHC Basel was 'B-Meister' (3-2 playoff winner in the final against EHC Visp ) and rose to the NLA without relegation games, which was carried out with 13 teams in the following season .
The 12 teams played 2 double rounds of 22 games each. Then the best eight teams determined the Swiss champions in play-off style. Quarter-finals , semi-finals and the final were each played according to the best-of-seven mode.
The last two teams determined in the play-outs the team that had to play against the champions of National League B to stay relegated.
Due to the affair about the use of a player who was not eligible to play by the Friborg-Gottéron and the resulting game rating to the disadvantage of Friborg, the table of the National League A was changed so that SC Langnau was moved to 11th place in the table. Then the SC Langnau refused to play the play-outs, which were then canceled by the association.