Good afternoon Susan,
I'm Doug, and I'm very sorry to hear of your situation. My goal is to provide you with excellent service today.
Under social security regulations, your daughter is only entitled to the child benefit if she remains in high school and until age 19. As soon as she turns 18 if she is no longer in school she loses her eligibility for the social security benefit.
In order to discontinue her benefit you will need to either call social security at 1-***-***-****, or go to the local social security office and inform them of these changes in circumstance. They will immediately terminate her eligibility. If you are not having any luck in calling social security, then you should go to the local office. All social security can do now, because your daughter is over 18, is to take the information from you and investigate the fraud that your daughter is engaged in if she is still receiving benefits. She will eventually get caught and she will have to pay back any monies paid to her after she dropped out of school.
As for making a notification of the change of circumstances to Medicaid, if you know who the case worker is on the Medicaid benefit, you should contact them. If you do not know then you will need to contact the department of health or department of human services in your state to notify them
You may reply back to me using the Reply link and I will be happy to continue to assist you until I am able to address your concerns, to your satisfaction.
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I wish you and yours the best in 2015,