If VA already decided your claim and relevant official service department records that existed back then later get added to your file, 38 CFR 3.156(c) requires VA to reconsider the claim. When that happens, any award can be backdated to your original claim date — not the date you reopened. That's the difference between a few months of back pay and years of it.
The short version, vet to vet
Most veterans hear "denied" and treat it like a closed door. I didn't have a box of records when I started, and I still ended up at 100% — because the records that matter are usually sitting in a system, not in your closet. This page is about one specific, badly underused rule built for exactly that situation: when paperwork the government already had finally shows up in your file.
I'll be straight with you: this is not a magic back-pay button, and anybody selling it that way is lying to you. It's narrow. But for the right veteran it's one of the most valuable rules in the whole 38 CFR — so it's worth knowing whether you're that veteran.
What is 38 CFR 3.156(c)?
3.156(c) is a reconsideration rule. The regulation states that at any time after VA issues a decision on a claim, if VA receives or associates with the claims file relevant official service department records that existed and had not been associated with the file when VA first decided the claim, VA will reconsider the claim. The word is "will," not "may" — when the records qualify, reconsideration is mandatory, and it applies whether or not the evidence would count as "new and material" under the usual reopening rule.
It applies to any claim VA already decided. In practice the big payoff shows up for veterans who were denied, or who were granted but stuck with a later effective date than their original claim should have supported.
What counts as a "service department record"?
Read this twice, because it's where people go wrong. 3.156(c) is about records that come from the military / service department, not records you create now. The regulation specifically includes:
- Service records related to a claimed in-service event, injury, or disease (e.g., service treatment records, personnel records, unit records).
- Additional service records forwarded by the Department of Defense or your service branch to VA any time after VA's original request for records.
- Declassified records that couldn't be obtained earlier because they were classified when VA decided the claim.
What does not trigger 3.156(c): a new nexus letter, a new private medical opinion, a new DBQ, or buddy statements you write today. Those can strengthen a claim — but they're "new evidence," not pre-existing service department records, and they don't carry the 3.156(c) effective-date benefit.
Why this is different from just refiling
A regular supplemental claim with new evidence generally gets an effective date tied to the date you refiled. 3.156(c) is different: because the records existed all along and VA simply didn't have them in front of it the first time, the rule lets VA treat the claim as if it had been correctly decided back then — and reconsideration is supposed to happen automatically when qualifying records are associated, not only if you file something new.
How far back can the back pay go?
When VA grants based all or in part on those service department records, the award is effective on the date entitlement arose or the date VA received the previously decided claim, whichever is later (38 CFR 3.156(c)(3)). For a claim that's been kicking around for years, that can mean a very large retroactive award. It can also mean nothing extra if entitlement didn't actually arise until later. The records have to be relevant — they have to move the needle on service connection or the rating.
The catch most people miss
There's an exception in 3.156(c)(2): the rule does not apply to records that VA couldn't have obtained when it decided the claim because the records didn't exist yet, or because you didn't give VA enough information to identify and obtain them from the service department or another official source. The rule is built for records the government should have had — not for filling a gap you left open. That's not a reason to quit; it's a reason to understand exactly why your records weren't there the first time.
Who this actually helps — and who it doesn't
Be honest with yourself about whether you fit:
- This may help you if: VA already decided a claim (denied it, or assigned a later effective date), and there are official service records relevant to that claim that existed back then but weren't in your file — and now are, or now can be.
- This probably isn't your path if: your only new evidence is recent medical opinions, or there simply aren't pre-existing service records that change the picture. You may still have a strong claim — it just runs through a different door (a supplemental claim, an increase, or a first-time filing).
What to do if you think this applies to you
- Pull your decision history and figure out what was missing the first time.
- Identify the specific service department records that are relevant and weren't of record then.
- Get those records associated with your file and name the rule — 3.156(c) — explicitly.
- Effective dates and reconsideration are where VA makes the most mistakes, so this is a spot where a VSO or VA-accredited representative earns their keep. We teach you how the rule works; representation in front of VA is their lane, not ours.
Run a rough number first with the VA Back Pay Calculator, then read how dates work in general in VA effective date rules.
Key takeaways
- 3.156(c) requires VA to reconsider a decided claim when relevant pre-existing service department records surface.
- The big deal is the effective date: it can reach back to your original claim, not the refile.
- New medical opinions, nexus letters, and DBQs do not trigger it — only pre-existing service records do.
- Reconsideration is meant to be automatic, and it applies whether or not the records are "new and material."
Frequently asked questions
- Does new medical evidence trigger 3.156(c)?
- No. 3.156(c) is triggered by relevant official service department records that existed at the time of the prior decision but weren't in your file. New medical opinions, nexus letters, and DBQs are "new evidence" and run through the regular supplemental claim path instead.
- Do I have to file a brand-new claim to use it?
- Not in the usual sense. The regulation says VA will reconsider when qualifying service records are associated with the file, and that reconsideration is meant to be automatic rather than something that hinges on you filing a supplemental claim. In practice it's still wise to raise 3.156(c) explicitly so it isn't overlooked.
- How far back can my effective date go?
- Potentially to your original claim date or the date entitlement arose, whichever is later (3.156(c)(3)). The records must be relevant to the outcome, so the size of any retroactive award depends entirely on your specific facts.
- What if VA already had the records the first time?
- Then 3.156(c) generally doesn't apply — the rule is for records that existed but weren't associated with the file. If VA already considered them, you're looking at a different path.
- Is there a deadline to use 3.156(c)?
- There's no "use it or lose it" appeal clock here, because it's a reconsideration rule tied to records surfacing rather than to an appeal window. Don't sit on it, though — the sooner the records are associated, the sooner VA has to act.
Sources
- 38 CFR 3.156(c) — reconsideration based on service department records (current eCFR): https://www.ecfr.gov/current/title-38/chapter-I/part-3/subpart-A/subject-group-ECFR7629a1b1e9bf6f8/section-3.156
- 38 CFR 3.400 — effective dates (for the cross-referenced rules).
- VA Adjudication Procedures Manual (M21-1) — service department records / reconsideration.
