The women's 400 metre individual medley competition at the 1999 Pan Pacific Swimming Championships took place on August 22 at the Sydney International Aquatic Centre. The last champion was Kristine Quance of US. This race consisted of eight lengths of the pool. The first two lengths were swum using the butterfly stroke, the second pair with the backstroke, the third pair of lengths in breaststroke, and the final two were freestyle. Records Prior to this competition, the existing world and Pan Pacific records were as follows: Results All times are in minutes and seconds. Heats The first round was held on August 22. Final The final was held on August 22. References 1999 Pan Pacific Swimming Championships 1999 in women's swimming