Social Security Disability Insurance (SSDI) & Supplemental Security Income (SSI): The Two Primary “Flavors” of Disability Benefits Disability LawSocial Security Disability Eligibility: Are You Disabled? SSD Hearings SSD Appeals Process Helping With Your Doctors Social Security Disability Benefits Over 50 Years Old SSDI & Long Term Disability Medical ConditionsBack Pain Diabetes Lupus Scleroderma Fibromyalgia Depression SSDI and SSI Compared: The Same in Some Ways, Different in Others SSDISSI Definition of "Disability" Inability to Do Any Work. Click here for more details about the definition of "disability" here Application and Appeal Process The application and appeal process for SSDI and SSI is the same. Click here for more details about the disability application and appeal process. Work Requirement YES. Fully insured status based upon payroll Taxes paid (work credits)NO. No work history is required. Needs Requirement NO. SSDI benefits are not based upon "need". A billionaire who has paid social security taxes and is unable to do any work and can qualify for SSDI.YES. Must be basically indigent: more more than $2000 in "resources" or bringing on more than $735/month means your don't "need" SSI. Medical Coverage Medicare after 24 months of entitement to disability benefitsMedicaid starting with month after disability Retroactive Benefits No more than 1 year prior to the date of disability applicationNo benefits payable prior to date of SSI application.