Social Security Disability Insurance (SSDI, SSD, or Title II) is a program that offers monthly payments to people who have worked long enough—and paid taxes on those earnings—and who can no longer work due to disability. SSDI protects over 156 million workers, with 677,394 beneficiaries in California, as of December 2019.
Since the federal government runs SSDI, there are no differences across states for eligibility, and benefits should stay the same if you were to move to another state.