"Pre-Existing Condition Not Aggravated by Service"
The presumption of soundness
If a condition was not noted on the entrance examination, VA must rebut soundness with clear and unmistakable evidence on both prongs. Wagner v. Principi, 370 F.3d 1089 (Fed. Cir. 2004); VAOPGCPREC 3-2003. A history the reported at enlistment is not, by itself, a notation of a defect.
'Clear and unmistakable' is a far higher standard than the usual balance-of-evidence test. A single examiner's statement that a condition 'likely predated service' does not ordinarily satisfy it.
When the condition was noted at entry
Then the question is . Under 38 CFR § 3.306, an increase in disability during service is presumed to be aggravation unless there is a specific finding that the increase is due to the natural progress of the disease. Temporary flare-ups without a worsening of the underlying condition do not establish aggravation. Hunt v. Derwinski, 1 Vet. App. 292 (1991).
Evidence that speaks to aggravation
- The entrance examination itself — what was and was not noted decides which standard applies.
- In- showing a change in frequency, severity, or treatment intensity.
- A profile change, duty limitation, or separation examination documenting a worse baseline than at entry.
- A medical opinion that distinguishes natural progression from service-related worsening and explains why.
Frequently Asked Questions
References & sources
- 38 CFR § 3.303 — Principles relating to service connection — Code of Federal Regulations
- 38 CFR § 3.159 — VA's duty to assist — Code of Federal Regulations
- 38 CFR § 3.2500 — Review of decisions (AMA lanes) — Code of Federal Regulations
- Caluza v. Brown, 7 Vet. App. 498 (1995) — U.S. Court of Appeals for Veterans Claims · Sets out the three elements of service connection.
Useful Tools & Topics
Have questions about your specific case?
Every veteran's facts are different. A free initial consultation with a VA-Accredited Claims Agent can tell you whether your matter is a fit for representation — and what the right next step looks like either way.
Disclaimer: This page is for educational purposes only and does not constitute legal advice. Oakridge Claims is a private business and is not affiliated with, endorsed by, or operated by the U.S. Department of Veterans Affairs. No guarantees of outcomes are made. Each claim is decided on its individual facts.
Related guides
"No evidence of an in-service event or injury"
When service treatment records are silent — lay evidence under Buchanan, personnel records, and the combat presumption in 38 U.S.C. § 1154(b).
"Not proximately due to a service-connected disability"
Secondary service connection and aggravation under 38 CFR § 3.310, and the baseline problem that sinks most secondary denials.
"The evidence does not show exposure"
What VA means when it rejects a presumptive exposure claim, and which records establish location, dates, and unit.
"Not incurred in or caused by service"
The most common denial sentence in VA decisions — what element it refers to and what closes the gap.

