Release of child's medical to family member

[t74]

Make yourself available to take to or, at least, pick up the child at appointments so the therapist talks to you rather than grandmother.

I would be concerned if grandmother is overbearing and sees herself as parent rather than grandparent. Since mother does not appear to be communicating with the therapist in person before the child's session, grandmother is the information conduit. Why would the grndmother be involved in therapy if there was not some concern about that relationship? The issue would be the same if OP's SO were to replace grandmother.

What is legal may not be in the best interest of the parents and child. IMO, OP needs more information about the reasons for the therapy, grandmother's involvement, and professional review of what is appropriate in their specific situation.

 

[Taxing Matters]

I am seeing it more as a violation of joint legal custody. Making decisions about who can be involved in the child's counseling/therapy when the other parent is opposed.

Even if it caused a problem with joint legal custody (and I'm not seeing it, though we also don't have the full details) it is still not contempt unless there is a court order that specifically bars grandma from being involved. The OP may file in court to get an order to that effect, but that's different than a contempt action. And again, whether the OP would be successful in getting such an order is a matter the OP needs to discuss with a family law attorney.