Health insurance

I have a discussion or just an answer if you will . My mother is 62 years old and she is needing to go to the doctors more often . My mother has been married for 32 years to my stepdad who has his insurance through his Union . My step dad is currently is on SSID . The first thing I thought was why can’t my mom get on his insurance they are married right . Well I was recently told that about 13 years ago when my stepdad was qualifying for his disability through the union. They had mailed my parents a letter stating if they want to add my mother to the health plan then now is the time to do so . For whatever reason it was , they didn’t elect to add her on his insurance . My next thing I asked my mom was can you get on ahhccss that way you will have some coverage . She said because her husband made to much annually per their requirement she is not allowed to get ahhccss . So last week my mother went to the doctor and she might have a clot in her heart . They want her to take sone test that cost over 1200$. Well my mother and step dad do not have that money in their bank right now . Does anybody have any idea , option , solution to where my mother should and can go to atkeast get some help with these charges . Please I am a concerned son who just wants my mother to be seen and not let $ decide if she is going to have complications with her health .