The Navy Disability Evaluation System (DES/IDES): MEB, PEB, Ratings, and Your Options (2026)

If a Navy medical authority has flagged a condition that may keep you from doing your job, you are entering the Disability Evaluation System (DES). This is the formal process the Navy uses to decide whether you can stay in, and if not, whether you leave with disability retirement, severance pay, or nothing.

This guide is the overview. It walks the whole journey from referral to disposition, explains the 30% rule that drives your outcome, and points you to deeper guides on each piece. Other branches run equivalent systems, but the roles, boards, and authorities here are Navy-specific and governed by SECNAV M-1850.1 (23 Sep 2019), SECNAVINST 1850.4F, and DoDI 1332.18.

The DES journey: referral to disposition

The DES has three phases: the MEB, the PEB, and Transition. It begins when a medical authority refers you in. From there, the case moves through a documented sequence with hard deadlines at several points. The full MEB and PEB process is covered in its own guide; here is the map.

A key point that trips people up: the MEB does not decide whether you are fit. It only documents the conditions and hands the case to the PEB. The PEB is where fitness is decided.

The PEB fit or unfit finding

The Physical Evaluation Board decides one thing first: are you fit or unfit? The Informal PEB (IPEB) does this on paper. If you concur, the case proceeds. If you disagree, you have 15 calendar days to demand a Formal PEB (FPEB), which is an in-person hearing where you have counsel and the right to testify and present evidence.

The standard for an Unfit finding is a preponderance of the evidence that you cannot reasonably perform the duties of your office, grade, rank, or rating. In plain terms: does the condition stop you from doing your job. If the board finds you Fit, you return to duty and the DES ends.

If you are found Unfit, one of four dispositions follows:

• Permanent Disability Retirement (placement on the Permanent Disability Retired List, or PDRL)
• Temporary Disability Retirement (placement on the Temporary Disability Retired List, or TDRL)
• Separation with disability severance pay
• Separation without benefits (for disabilities resulting from misconduct or willful neglect)

The 30% rule: what decides your outcome

Once you are found unfit, two numbers decide everything: your disability rating and your years of service. This is the 30% rule, set in statute at 10 U.S.C. 1201, 1202, and 1203. The table below maps the combinations.

A few nuances worth knowing:

• 20 years of service is its own path to retirement. If you have 20 or more years, you are permanently retired even if your rating is below 30%.
• Unstable but severe conditions. A member with unstable conditions rated at 80% or higher, not expected to improve below 80%, is permanently retired rather than placed on TDRL. The instability rule that normally sends you to TDRL is overridden when the floor is that high.
• Severance pay math. Disability severance pay credits a minimum of 3 years of service (a minimum of 6 years if the disability is combat-zone or combat-related). A part-year of 6 months or more rounds up.

TDRL vs PDRL

Both are forms of disability retirement, and the difference is stability. See the PDRL vs TDRL guide for the full comparison.

PDRL (permanent) is for a disability that is both permanent and stable, where you either rate 30% or higher with under 20 years, or have 20+ years of service. "Stable" has a specific meaning here: the severity is unlikely to change enough in the next 3 years to change the rating percentage.

TDRL (temporary) is for a member who meets the PDRL criteria in every respect except that the disability is not yet stable, though it may become permanent (rating 30% or higher). TDRL is a holding status while your condition settles.

A critical number to get right: TDRL is capped at 3 years for placements on or after 1 January 2017. Many sites still cite the old 5-year cap, which only applies to placements before that date. A re-evaluation is initiated within 18 months of placement, and at the end of TDRL you are either permanently retired, separated, or (rarely) returned to duty.

IDES vs legacy DES: one exam, two ratings

There are two versions of the DES, and the difference matters for your rating and your timeline. The IDES vs legacy DES guide goes deeper.

IDES (Integrated Disability Evaluation System) is the joint DoD-VA process and the standard path for active-duty members. It uses a single set of VA Compensation and Pension (C&P) exams. The VA is the initial rating entity: a VA Military Services Coordinator (MSC) runs the claim, and the Disability Rating Activity Site (DRAS) produces the rating. The Navy PEB determines fitness but does not assign ratings. It applies the VA-provided ratings to your unfitting conditions.

Legacy DES (LDES) has no VA activities. The Navy PEB itself rates the unfitting conditions using the VA Schedule for Rating Disabilities (VASRD, at 38 CFR Part 4). If you go through a Permanent Limited Duty re-evaluation, you may elect either IDES or LDES after consulting a DES attorney.

Why your DoD and VA numbers differ

This is the single most misunderstood mechanic in the system, so it is worth being precise. Under IDES, the same exam set produces two different percentages:

• DoD rates only the unfitting condition(s). This number drives your military retirement or severance. If only your knee makes you unable to do your job, only your knee counts here.
• The VA rates all of your service-connected conditions. This number drives your lifetime VA compensation. Your knee, your tinnitus, your back, your sleep apnea, and anything else service-connected all count.

Because the two boards are answering two different questions from the same exams, the numbers routinely differ, and your VA rating is often higher than your DoD rating. That is normal and expected, not an error.

The appeal ladder

You have formal points to push back at almost every stage. Missing a deadline can forfeit a right, so track the day counts.

1. MEB stage: submit an MEB rebuttal or request an Impartial Medical Review (IMR) within 5 calendar days of receiving the MEB report.
2. IPEB stage: concur or demand a Formal PEB within 15 calendar days of the informal findings.
3. Rating stage: request a one-time VA rating reconsideration (of the unfitting condition only).
4. Petition for Relief (PFR): to DIRSECNAVCORB, based on new evidence, fraud, or a mistake of law.
5. Board for Correction of Naval Records (BCNR): available after separation.

The presumption of fitness landmine

If you are near your retirement date, High Year Tenure, or your End of Active Obligated Service (EAOS), you are presumed fit. The logic is that if you were about to serve out your career anyway, a condition surfacing at the very end is presumed not to have made you unfit.

This presumption can block a medical retirement, so flag it early. If your condition genuinely prevents you from doing your job, you can rebut the presumption, but it is a real hurdle and you should raise it with your DES counsel before your timeline runs out.

The PLD off-ramp: staying in after unfit

A finding of Unfit normally means you are separated or retired, but it is not always the end of your Navy career. You may request Permanent Limited Duty (PLD) to stay on active duty, and you must do so within 15 days of the PEB findings. PLD over 12 months is referred back to the DES for re-evaluation. If that re-evaluation happens under IDES/LDES rules, you elect your path after consulting a DES attorney. See the Permanent Limited Duty guide for eligibility and how to request it.

Roles and key forms

Know who does what, because their jobs are not interchangeable:

• PEBLO (Physical Evaluation Board Liaison Officer): your non-medical case manager and liaison. Helpful, but not a legal advocate. Do not rely on your PEBLO for legal strategy.
• Government DES counsel: provides your legal counseling and walks you through the Election of Options. This is your legal resource.
• VA Military Services Coordinator (MSC) and DRAS: run and produce your rating under IDES.
• ASN (M&RA): the Assistant Secretary of the Navy for Manpower and Reserve Affairs is the final decision authority on most calls.

If your disability is determined to be combat-related, that finding ties into Combat-Related Special Compensation. See the CRSC guide for how that works and why it can matter for your pay.

Frequently asked questions

What is the military disability 30% rule?

The 30% rule, set in statute at 10 U.S.C. 1201-1203, decides whether an unfit member is retired or separated with severance. You are placed on disability retirement if your disability is permanent and stable and you are either rated at 30% or higher with under 20 years of service, or you have 20 or more years of service regardless of rating. If you are unfit with under 20 years and a rating below 30%, you are separated with disability severance pay instead of being retired.

What is the difference between IDES and legacy DES?

IDES (the Integrated Disability Evaluation System) is the joint DoD-VA process and the standard path for active-duty members. It uses a single set of VA Compensation and Pension exams, the VA assigns the ratings, and the Navy PEB applies those ratings to your unfitting conditions. Legacy DES (LDES) has no VA activities: the Navy PEB itself rates the unfitting conditions using the VASRD (38 CFR Part 4), and any VA rating is handled separately.

Why is my VA rating higher than my DoD rating?

Because the two ratings answer different questions from the same set of exams. DoD rates only the condition or conditions that make you unfit for duty, and that number drives your military retirement or severance. The VA rates all of your service-connected conditions, and that number drives your lifetime VA compensation. Since the VA is counting everything and DoD is counting only what ended your career, the VA figure is often higher, and that difference is normal.

What is the difference between TDRL and PDRL?

Both are disability retirement, and the difference is whether your condition is stable. PDRL (the Permanent Disability Retired List) is for a disability that is permanent and stable, meaning its severity is unlikely to change enough in the next 3 years to change your rating. TDRL (the Temporary Disability Retired List) is for a member who meets the retirement criteria except that the condition is not yet stable but may become permanent, rated at 30% or higher. TDRL is a temporary holding status with re-evaluation.

How long can I stay on the TDRL?

For placements on or after 1 January 2017, TDRL is capped at 3 years. Placements before that date fall under the older 5-year cap, so the 5-year figure many websites still cite no longer applies to current cases. A re-evaluation is initiated within 18 months of placement, and at the end of the period you are either permanently retired, separated, or returned to duty depending on your condition and rating.

Can I stay in the Navy after being found unfit?

Sometimes. A finding of Unfit normally means separation or retirement, but you may request Permanent Limited Duty (PLD) to stay on active duty, and you must request it within 15 days of the PEB findings. PLD lets you keep serving in a limited capacity, but any period over 12 months is referred back to the DES for re-evaluation, at which point the process starts again.

What is the presumption of fitness?

The presumption of fitness applies when you are near your retirement date, High Year Tenure, or End of Active Obligated Service. The idea is that if you were about to complete your service anyway, a condition surfacing at the very end is presumed not to have made you unfit for duty. It is a real landmine because it can block a medical retirement, so raise it with your DES counsel early. You can rebut the presumption if your condition genuinely prevented you from doing your job.

Who is my advocate during the DES process?

Your PEBLO (Physical Evaluation Board Liaison Officer) is your non-medical case manager and liaison, but the PEBLO is not a legal advocate. For legal counseling and help with your Election of Options, you work with government DES counsel. Under IDES, a VA Military Services Coordinator runs your claim and the Disability Rating Activity Site produces your rating, and ASN (M&RA) is the final decision authority on most cases.

---

Sources current as of 2026: SECNAV M-1850.1 (23 Sep 2019), SECNAVINST 1850.4F, DoDI 1332.18, the VASRD (38 CFR Part 4), and the FY2023 NDAA Section 711 IDES accountability policy. This is general information, not legal advice. Consult your PEBLO and your DES counsel for guidance on your specific case.