1. Personal Identification Documents

Start by verifying your identity. The Social Security Administration (SSA) will require:

• Social Security number
• Birth certificate or proof of age
• Proof of U.S. citizenship or lawful resident status (if born outside the U.S.)
• Marriage and divorce records, if applicable (to determine potential spousal benefits)

These documents help establish who you are and whether you meet the basic legal criteria for SSDI.

2. Work History and Income Records

Since SSDI is based on your work record, the SSA must evaluate your past employment. Be prepared to provide:

• A detailed work history covering at least the past 15 years
• W-2 forms or tax returns (especially if you're self-employed)
• Names and addresses of past employers
• Information about the type of work you performed and how your disability affects your ability to do it

This information is used to determine if you’ve earned enough work credits to qualify and whether you can return to any of your previous jobs.

3. Medical Records and Evidence

Your medical documentation is one of the most important parts of your SSDI application. You’ll need:

• Names, addresses, and phone numbers of all doctors, hospitals, and clinics
• Complete medical records, including treatment notes, test results, and discharge summaries
• A list of all prescribed medications, including dosages and side effects
• Results from labs, X-rays, MRIs, and CT scans
• Records from specialists, physical therapy, or mental health care
• Any surgeries or procedures you’ve undergone

If possible, include a statement from your doctor explaining your diagnosis, symptoms, treatment plan, and how your condition limits your ability to work. The more detailed your records, the better your chances.

4. Daily Living and Functional Information

The SSA may also want to know how your disability affects your day-to-day life. You might be asked to complete questionnaires or provide:

• A Function Report, explaining how your condition limits everyday tasks (cooking, bathing, walking, concentrating)
• Testimony or statements from friends, family members, or caregivers
• Any records from vocational rehab programs, if applicable

This gives the SSA a clearer picture of how your condition impacts both work and personal activities.

5. Optional but Helpful: Supporting Forms

You may also want to include:

• A Residual Functional Capacity (RFC) form completed by your doctor
• Letters from employers explaining job loss or reduced duties due to your condition
• A Disability Determination Services (DDS) contact form (if required in your case)

These documents can help clarify your level of functioning and offer outside support for your claim.