Why? The language of your medical records, including death certificate, can affect the VA's survivor benefit program called Dependents Indemnity Compensation (DIC). Your passing due to a service-connected disability may entitle your survivor (and minor or disabled adult children) to a modest tax-free pension of about $1300 per month for life.
In my case, I have discussed with my doctors the need annotate my medical records and death certificate specifically in reference my exposure to toxic Agent Orange as an underlying cause of death, if in accordance with their own ethics and judgment. Further, I have a letter to whoever completes my death certificate all the details about my dioxin exposure, the VA-recognized illnesses associated with dioxin and a list of the illnesses I have been treated for. I specifically ask that, if in accordance with his/her judgment, my cause of death be "(cause), due to toxic Agent Orange exposure."