The Mercat de La Concepció is not one of the main attractions of the city, therefore it is not a highly touristic area. Because of this it was not really adapted for people with movement disabilities. Most of the market is accessible by wheelchair but there are some parts that you will not be able to access.
On the other hand, the whole area is fully accessible and public transportation like the bus or taxis that stop here are wheelchair friendly. Because of its wide streets there is also the option of getting to the market with a private car.