IDES vs. LDES – What's the Difference?
If you are being medically evaluated for potential separation or retirement, you will be processed through one of two systems: the **Integrated Disability Evaluation System (IDES)** or the **Legacy Disability Evaluation System (LDES)**. Both systems determine fitness for duty and potential medical retirement, but differ in process and outcome.
Integrated Disability Evaluation System (IDES)
IDES is the default system for most Active Duty and Reserve members. It is a **joint process** between the DoD and the VA. If you go through IDES, your VA rating is used to determine both your **DoD retirement eligibility** and your **post-service VA compensation**.
- Single medical exam used by both DoD and VA
- VA provides your official disability rating
- Streamlined transition between service and VA care
- Average timeline: 4–6 months (can vary)
Legacy Disability Evaluation System (LDES)
LDES is the older, branch-controlled system. The DoD determines your fitness and assigns a **DoD-only rating**, independent of the VA. You must file for VA benefits separately **after separation**, which can delay compensation.
- DoD assigns its own disability rating
- VA claim must be filed separately after discharge
- Often longer transition to benefits
- Still used in some Reserve/Guard or limited-service contexts
Key Differences Summary
| Feature | IDES | LDES |
|---|---|---|
| Who assigns rating? | VA | DoD |
| When do you file VA claim? | During process | After separation |
| DoD & VA synced? | Yes | No |
| Time to benefits | Faster transition | Slower, more paperwork |
Which Should You Be In?
Most Active Duty and full-time Reserve members will go through **IDES by default** unless explicitly processed under LDES due to limited service duration, admin policy, or specific branch procedure. **IDES is generally preferable** due to its unified evaluation and smoother handoff to VA care and compensation.