Many clients over the last 30 years have asked me this question, and the answer to the question is "no."
If the at-fault driver’s insurance company believes that its driver is at fault and they want to settle the case, they want to settle all personal injury-related claims at one time. (They will usually settle property damage claims separately.) They will not agree to leave open the issue of future medical expenses.
Thus, if a medical doctor says you will probably need a future medical treatment because of the injuries you sustained in the wreck, the cost of that medical treatment and related damages can be part of settlement negotiations. If the doctor says that future medical treatment is possible, then the amount of the possible medical treatment cannot be included.