Legal Question in Family Law in Massachusetts

I assume the other parent has primary physical custody and you both retain parental rights and "shared custody." Assuming that is the case. You should be kept informed about medical issues and should be consulted on things such as your children's need for therapy and the treatment. Moreover, you should be kept informed about their school work and related matters.

Without reading your separation agreement and/or divorce judgment, no one can tell you what additional specific rights you may have.

Yes, with shared legal custody, you are entitled to all of that information. However, the issue will be: what is the other parent obligated to provide to you as opposed to your getting the information yourself from the source.

Unless it's specifically stated otherwise in a court order, as a practical matter, most of the information, you will just have to get yourself.

However, if the other parent's failure to provide you info and communicate with you is negatively impacting the children, the question then becomes whether shared legal custody is appropriate or if it's better to just have one parent in that role.