What documents do I need to apply for SSDI?

You need your Social Security number, birth certificate, medical records from all treating sources, names and contact information for all doctors, a detailed work history for the past 15 years, and any award letters from other disability benefits [§ 42 U.S.C. 405]. The more complete your medical records, the stronger your application.

Can I apply for SSDI online?

Yes, you can start your SSDI application online at ssa.gov, by phone at 1-800-772-1213, or in person at an SSA field office in Mississippi (locations include Jackson, Gulfport, Hattiesburg, Biloxi, Meridian, Tupelo, Greenville, Columbus, Vicksburg, Oxford). The online application can be saved and completed over multiple sessions.

How does SSA determine if I am disabled?

SSA uses a five-step sequential evaluation process [§ 20 C.F.R. 404.1520]: (1) Are you working above SGA? (2) Is your condition "severe"? (3) Does your condition meet a listed impairment? (4) Can you do your past work? (5) Can you do any other work? You must be found disabled at one of these steps to qualify.

How far back can I receive SSDI benefits?

SSDI benefits include a mandatory 5-month waiting period from your established onset date [§ 42 U.S.C. 423]. You can receive up to 12 months of retroactive benefits from the date you file your application, meaning your onset date can be up to 17 months before your application date.

What happens after I submit my SSDI application in Mississippi?

Your application is forwarded to Mississippi Disability Determination Services (DDS), Department of Rehabilitation Services, which reviews your medical evidence and may schedule consultative exams. Processing typically takes 150-210 days. You will receive a written decision by mail.

Topic guideUpdated 2026-02-27

Applying for SSDI in Mississippi — Step-by-Step Guide

How to apply for Social Security disability benefits in Mississippi, what documents you need, and what to expect during the review process.

You can apply for Social Security Disability benefits through several channels §42 U.S.C. 405.

How to Apply

Online at ssa.gov (SSDI and adult SSI)

By phone at 1-800-772-1213

In person at an SSA field office in Mississippi (Jackson, Gulfport, Hattiesburg, Biloxi, Meridian, Tupelo, Greenville, Columbus, Vicksburg, Oxford)

For SSI, you must apply in person or by phone — online applications are only for SSDI

What You Need to Apply

Social Security number and proof of age

Medical records, doctor contact information, and treatment history

Work history for the past 15 years (job titles, duties, dates)

Medications list (names, dosages, prescribing doctors)

Information about any other benefits you receive

The Initial Review Process

After you apply, your claim is sent to the Mississippi Disability Determination Services (DDS), Department of Rehabilitation Services for a medical determination. The DDS reviews your medical records, may request consultative examinations, and determines whether your condition meets SSA's definition of disability §42 U.S.C. 423.

Processing in Mississippi typically takes 150-210 days^{[SSA Annual Statistical Report on SSDI]}. The initial approval rate is approximately 37%.

Five-Step Sequential Evaluation

SSA uses a five-step process to evaluate disability claims §20 C.F.R. 404.1520:

Are you working at substantial gainful activity (SGA) level?

Is your condition severe?

Does your condition meet or equal a Listed impairment?

Can you do your past relevant work?

Can you do any other work in the national economy?

✓Apply as soon as you become disabled. There is a five-month waiting period for SSDI benefits, and SSI benefits begin from the application date.

Prepare for Your Consultation

Quick checklist (SSDI)

Gather these before your first consultation.

Medical records

(doctor reports, hospital records, test results)

Work history

(past 15 years of employment, job duties)

Daily activities log

(limitations on daily tasks, self-care)

General preparation tips only. Specific needs depend on your state and claim type.

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