Provides a monthly cash grant to people who are aged, blind, or disabled and who receive federal Supplemental Security Income (SSI) benefits. Some persons whose income is too high to receive SSI may be eligible for MSA. NOTE: Most MSA-eligible applicants also receive or are eligible to receive SSI, and/or RSDI. Applications for SSI/RSDI are handled through the local Social Security office. MSA-eligible applicants may also be eligible for the Medicare Savings Programs.