What is considered a disability:

Per SSA rules: “Your condition must significantly limit your ability to do basic work-related activities, such as lifting, standing, walking, sitting, or remembering – for at least 12 months. “

Certain conditions are considered “compassionate allowance” conditions, which include certain cancers, heart diseases, childhood diseases, and neurological conditions such as Huntington’s Disease. These certain conditions are considered to meet SSA’s definition of disability, and often result in an expedited approval of disability benefits.

https://www.ssa.gov/compassionateallowances/

https://www.ssa.gov/compassionateallowances/documents/Compassionate%20Allowances%20Conditions%201%20-%20278.pdf