Disability Resolution, PASSI, SSDI, DAC, RSDI: What These Terms Mean and How Law Firms Fit In
If you've been researching Social Security disability benefits and stumbled across terms like PASSI, DAC, RSDI, or Disability Resolution, you're not alone in feeling confused. These aren't household words — but they represent real, distinct parts of the Social Security system. Understanding what each term means, and where legal representation fits into the picture, can make the process feel far less overwhelming.
What Is SSDI — and How Does It Differ from RSDI?
SSDI (Social Security Disability Insurance) is the disability program most people are referring to when they say "disability benefits." It's funded through payroll taxes and requires a work history to qualify. Your eligibility is tied to work credits — points earned through years of employment and Social Security tax contributions.
RSDI (Retirement, Survivors, and Disability Insurance) is the broader program umbrella. SSDI is one branch of RSDI. The others cover retirement benefits and survivor benefits for family members of deceased workers. When the Social Security Administration (SSA) or a law firm references RSDI, they're usually speaking about the entire family of contributory Social Security programs — not just disability.
The distinction matters because your work record determines which RSDI programs you may access, and each has different eligibility criteria.
What Is DAC — Disabled Adult Child Benefits?
DAC (Disabled Adult Child) benefits are a specific SSDI category that often surprises people. If you became disabled before age 22 and have a parent who receives Social Security retirement or disability benefits — or who has died — you may qualify for benefits based on your parent's work record, not your own.
Key features of DAC benefits:
| Factor | Detail |
|---|---|
| Age of disability onset | Must have begun before age 22 |
| Work record used | Parent's, not the adult child's |
| Benefit amount | Up to 50% of parent's benefit (or 75% if parent is deceased) |
| Medical standard | Same five-step SSA evaluation as standard SSDI |
| Medicare eligibility | 24-month waiting period applies after DAC approval |
DAC claims can be complicated because they require establishing both a qualifying relationship to the parent and a medically documented disability that began before age 22. The timing of onset — and the medical evidence supporting it — becomes especially critical.
What Does "PASSI" Mean in This Context?
PASSI isn't a widely standardized SSA acronym, but it appears in certain legal and disability advocacy contexts to reference Pre-Adjudicative or Post-Award SSI/SSDI support services, or sometimes as a shorthand for Public Agency SSI outreach programs. It can also appear in state-level Medicaid assistance coordination tied to SSI eligibility.
If you've seen "PASSI" used by a specific law firm or advocacy organization, it likely refers to their internal framework for managing both SSI and SSDI claims simultaneously, or tracking where a claimant is in the pre- versus post-approval process.
SSI (Supplemental Security Income) is need-based and does not require a work history — it's funded by general tax revenue and has strict income and asset limits. Many applicants pursue SSI and SSDI concurrently when they have limited work credits but also limited resources. Law firms handling disability cases frequently manage both tracks at once.
What Is "Disability Resolution" and What Do Law Firms Do?
"Disability Resolution" typically refers to reaching a final, favorable determination on a disability claim — whether through initial approval, a reconsideration, an ALJ (Administrative Law Judge) hearing, or an Appeals Council decision.
The SSDI process moves through distinct stages:
- Initial Application — Filed with SSA; reviewed by DDS (Disability Determination Services) at the state level
- Reconsideration — A second review if the initial claim is denied
- ALJ Hearing — An in-person or video hearing before a judge; approval rates are generally higher at this stage
- Appeals Council — A review of the ALJ's decision if denied
- Federal Court — Final option if all SSA-level appeals are exhausted
Law firms specializing in SSDI typically enter the picture at or before the ALJ hearing stage, where the complexity of presenting medical evidence, vocational testimony, and legal arguments increases significantly. They work on contingency, meaning they only collect a fee if you win — capped by SSA at 25% of back pay, up to a federally regulated maximum (adjusted periodically).
How Back Pay and Benefit Timing Work 💡
One reason disability resolution matters so much is back pay. SSDI back pay covers the period between your established onset date (EOD) and your approval date, minus the mandatory five-month waiting period SSA imposes before benefits begin.
The longer a case takes — and SSDI cases routinely take one to three years — the larger the potential back pay amount. This is why many claimants work with legal representation even after initial denial: the financial stakes grow over time.
Your monthly benefit amount is calculated using your AIME (Average Indexed Monthly Earnings) — a formula based on your lifetime earnings record. It is not a flat amount, and it adjusts annually through COLAs (Cost-of-Living Adjustments). Dollar figures like SGA (Substantial Gainful Activity) thresholds — the earning limit that determines whether SSA considers you "working" — also change yearly.
The Variables That Shape Every Outcome
No two SSDI cases are identical. The factors that determine whether, when, and how much someone receives include:
- Medical documentation — the completeness and consistency of your records
- Work credits — how recently and how long you worked
- Age at onset — SSA's medical-vocational grid rules treat older claimants differently
- RFC (Residual Functional Capacity) — SSA's assessment of what work you can still do
- Application stage — where you are in the initial → ALJ → appeals pipeline
- Whether DAC eligibility applies — and whether a parent's record is accessible
- Concurrent SSI filing — whether financial need adds a second eligibility track
Each of these factors interacts with the others. A strong medical record with a thin work history tells a different story than a solid work record with disputed medical evidence.
The terms — SSDI, RSDI, DAC, PASSI, disability resolution — are navigational markers for a system that ultimately makes its decisions one claimant at a time. Where you land within that system depends entirely on your specific combination of circumstances.
