But suppose you started Social Security at 62, for reasons unrelated to health, taking a reduction in benefits for filing before full retirement age (which is 66 and 8 months for people born in 1958, two months later for those born in 1959, and 67 for those born in 1960 or later). Six months later, you are diagnosed with kidney disease.

https://www.aarp.org/retirement/social-security/questions-answers/retirement-to-disability.html