Most car insurance policies require you to inform them soon after a crash has occurred. This can be a tricky conversation, though. The insurance agent is looking for any excuse to reduce or reject your claim. They will use well-developed strategies to get the information they need to justify the smallest payout possible. Therefore, do not go into detail about the accident, fault, or your injuries. As much as possible, stick to short answers and the facts: names of those involved, date, time, location, etc. It is enough to say, at this time, that you are injured and being medically treated – and leave it at that. Do not have contact with the other driver’s insurance.
If you contact a lawyer soon after your crash, they can handle this conversation with the insurance company for you.