Yes, it is possible - your health care team should be able to advise you about this.

However, please remember that different forms of Class II MHC proteins are just risk factors in the context of auto-immune diseases - they are not "genetic destiny". In my example above, some people with RA have not inherited the forms of HLA-DRB1 which are risk factors for it. Other people who have inherited those forms of HLA-DRB1 do not have RA.