Well then why did he ask me to call??? And leave me blooming blocked lol.
Because the hospital called him. That would worry me even if it was my ex and I would feel pushed to contact and check they were OK.
Maybe he forgot he had you blocked but at the end of the day he called you because the hospital rang him not because he suddenly wanted to chat.
If you are fooling yourself that he called cos he cares then you need to give your head a wobble 
Focus on you and getting well not your ex 