I'm Doug, and I'm very sorry to hear of your situation. My goal is to provide you with excellent service today.
I'm afraid that social security will not agree to establish a benefit for your child that will result in them qualifying for welfare benefits----such as SSI or Medicaid (known as MediCal in CA).
The Medicare is intended to take the place of the MediCal benefit so as not to leave the young disabled adult without health insurance of any kind.
But unfortunately there is no way to lower the survivor benefit or to even reject the survivor benefit in order to qualify for SSI. That is not allowed under both state and federal law.
The one thing that your child is allowed to do though is to work and earn income if they are able. They are allowed to earn as much as $809 per month and not have it effect their survivor benefits. This is a benefit to a disabled person who is capable of earning some amount of money.
I understand that you may be disappointed by the Answer you received, as it was not particularly favorable to your situation. Had I been able to provide an Answer which might have given you a successful legal outcome, it would have been my pleasure to do so.
If you have additional questions, you may of course reply back to me and I will be happy to continue to assist you further until your questions have been answered to your satisfaction.
Would you please take a moment to positively rate my service to you based on the understanding of the law I provided by clicking on the rating stars---three stars or more. It is that easy. That is the way I am compensated for having helped you.
Thank you in advance. I wish you the best in your future,