Start with your Social Security number and birth certificate

The Social Security Administration (SSA) will ask for your Social Security number first—you cannot start a California SSDI process without it. You will also need to provide your date of birth, which they will verify against your birth certificate or passport. Have both documents in front of you before you begin, because the form will not let you proceed without matching information.

If you do not have your Social Security number memorized, check your Social Security card, tax returns, or W-2 forms. If you have lost your card or never received one, you can request a replacement from SSA before you start the process—this takes about two weeks by mail.

Key Takeaways

  • You must provide your Social Security number, date of birth, and current mailing address before SSA will process your process.
  • Medical records from your doctors—including test results, diagnoses, and treatment dates—are the core of your case and should be gathered before you explore.
  • Work history information includes every job you held in the past 15 years, with employer names, dates, and the type of work you did.
  • SSA will ask about your current income, assets, and living situation to determine your financial need and any work incentive programs you may use.
  • You will need to name a representative payee if you cannot manage your own benefits, or provide information about a work incentive plan if you are still working.

Medical records and your diagnosis

SSA needs detailed medical evidence to decide your case. Gather records from every doctor, hospital, clinic, or mental health provider who has treated you for the condition that prevents you from working. This includes primary care doctors, specialists, therapists, and emergency room visits. Write down the name and phone number of each provider—SSA will contact them directly to request records.

For each provider, note the dates you were seen, what tests or imaging they performed (X-rays, MRI, blood work), what they diagnosed, and what treatment they gave you. If you have had surgery, hospitalization, or ongoing therapy, include those dates and the results. SSA does not accept your own summary of your medical history—they need the actual records from the medical provider, with the doctor's signature or letterhead.

If you have not seen a doctor recently, SSA may deny your case because there is no current medical evidence. If cost is a barrier, look into community health centers or Medicaid-covered providers in your county before you explore.

Work history for the past 15 years

SSA will ask you to list every job you held in the past 15 years, even if you only worked for a few weeks. For each job, provide the employer's name, the city and state where you worked, the dates you started and stopped, and a brief description of what you did (for example, "cashier at grocery store" or "data entry clerk"). If you are unsure of exact dates, give your best estimate—month and year is enough.

Include self-employment, gig work, and informal jobs. If you drove for a rideshare service, did freelance work, or sold items online, SSA needs to know about it. They use this history to understand what kind of work you have done in the past and why you cannot do it now because of your condition.

If you have not worked in several years, that is fine—just say so. SSA is not penalizing you for not working; they are building a picture of your work capacity.

Income, assets, and living arrangement

SSA will ask how much money you receive each month from any source: wages, unemployment, child support, family help, rental income, or benefits from other programs. They will also ask whether you own a home, a car, a bank account, or other property. Be honest about all of this—SSA cross-checks with tax records and financial institutions.

You will also need to say who you live with and whether anyone pays for your housing or food. If you live with family members who support you, SSA needs to know their names and relationship to you. This information affects how much your monthly SSDI payment will be and whether you are also may be able to access for Supplemental Security Income (SSI), which is a separate need-based program.

Contact information for references and representatives

SSA will ask for the phone numbers and addresses of the doctors and providers you listed. They will contact these providers to request your medical records, so make sure the information is current and correct. If a provider has moved or closed, note that—SSA will try to track them down, but it may delay your case.

If you want someone else to handle your case—a family member, lawyer, or advocate—you will need to name them as your representative. You will provide their name, phone number, and address. If you are working or plan to work while receiving SSDI, you may also need to provide information about a work incentive plan, such as a Plan to Achieve Self-Support (PASS) or Impairment Related Work Expenses (IRWE). These are optional, but they can help you keep more of your earnings without losing benefits.

Citizenship and residency status

SSA will ask whether you are a U.S. citizen or lawful permanent resident. If you are not a citizen, you will need to provide your immigration status and document number (such as your green card number or visa number). Non-citizens can receive SSDI if they meet the work history requirement—SSDI is based on your own work record, not citizenship status.

You will also confirm that you live in California and provide your current mailing address. If you have moved recently, use your current address, not a previous one.

Functional limitations and daily activities

SSA will ask you to describe how your condition affects your ability to work and perform daily tasks. This is not a medical question—it is a practical one. For example, if you have arthritis, SSA wants to know whether you can sit for eight hours, lift objects, or use your hands for fine motor tasks. If you have depression, they want to know whether you can concentrate, follow instructions, or be around other people.

Be specific and honest. Do not minimize your limitations or exaggerate them. SSA will compare your description to your medical records, so consistency matters. If your medical records say you have severe pain but you tell SSA you can work full-time, they will notice the contradiction and may deny your case.

Frequently Asked Questions

Do I need to have all my medical records before I explore?

No. You can start your process without them, but SSA will not make a decision until they receive records from your doctors. It is faster to gather what you can beforehand and give SSA the provider contact information so they can request the rest. If you wait for SSA to request records, the process takes longer.

What if I do not remember exact dates for my jobs or medical visits?

Approximate dates are acceptable. Give the month and year if you can, or just the year if that is all you remember. SSA will verify employment dates through tax records and medical dates through provider records. Do not leave the field blank—your best estimate is better than nothing.

Can I explore if I am still working?

Yes. You can work and receive SSDI if your earnings are below the substantial gainful activity (SGA) limit, which changes each year. You will need to report your current income and may want to discuss work incentives with SSA before you explore. Some work incentives let you keep more of your earnings without losing benefits.

Do I need a lawyer to fill out the process?

No. The process is free and you can complete it yourself. A lawyer or advocate can help, but they are not required. If you hire a representative, SSA will pay them a fee from your back pay if you win—you do not pay out of pocket.

What happens if I give SSA wrong information by mistake?

Tell SSA as soon as you realize the error. You can contact your local SSA office or call 1-800-772-1213 to correct it. Honest mistakes do not disqualify you, but intentional fraud can result in overpayment demands or criminal charges.