This bill retroactively eliminates the waiting period for Social Security Disability Insurance (SSDI) benefits for certain individuals with amyotrophic lateral sclerosis (ALS). Commonly known as Lou Gehrig's Disease, ALS is a progressive neurodegenerative disease that affects nerve cells in the brain and spinal cord. Under current law, most SSDI recipients must wait five months after becoming disabled before their benefit payments may begin. The ALS Disability Insurance Access Act of 2019 eliminated the waiting period for individuals with ALS but only covers individuals who apply for benefits after the date of enactment (December 20, 2020). As a result, individuals with ALS who applied for SSDI benefits in the five months before that date are still subject to the waiting period. This bill eliminates the waiting period for those individuals.