Legal Question in Personal Injury in California

There is an old saying that, "anybody can sue anybody for anything", but winning is a different question. You need to discuss your claims and evidence and ''damages' with a civil litigation attorney in confidence, to determine if you have a 'right' and grounds to sue, and if they are legally protected and immune from such lawsuit, and if they had a legal obligation that they violated, and if you have legally recognizable damages, and a monetary claim worth pursuing. Your post provides no such information on which to offer an opinion, and you shouldn't be disclosing your details in a public forum.

Here's another old saying, "the devil is in the detail". Depending on the nature of the so-called "VERY important information" that the ambulance people allegedly have and failed to transmit to the hospital, there may be a case. Additionally, there must be damages that resulted from the failure to transmit the information. So, if there is no damages that have resulted from the failure to communicate, then there is no case. The records and the facts have to be reviewed to figure out if there is a case.