Service Connection
These cases address how veterans establish that a disability is connected to military service, including direct service connection, secondary service connection, aggravation, nexus evidence, chronicity, continuity of symptoms, and presumptive service connection.
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Cases Found: 302
Adams v. Collins — obesity may be a disability for secondary service connection if it causes functional impairment
Court: CAVC | Year: 2025 | Read Full Case Breakdown →
Key Takeaway
Summary
Akins v. Derwinski — Failure to apply presumptions can constitute CUE
Court: CAVC | Year: 1991 | Read Full Case Breakdown →
Key Takeaway
Summary
The Court concluded that the 1946 decision relied only on basic entitlement language and failed to address the regulatory presumptions that were central to the claim. Because the record lacked the specific finding needed to rebut aggravation, and because failure to observe a regulation favorable to the claimant is itself error, the Court held that the original denial was CUE. It reversed the Board and remanded with instructions to amend the 1946 decision to grant service connection and assign the proper rating effective as of the original decision date.
Alemany v. Brown — Board may not require claimants to prove service connection by a preponderance of the evidence; benefit-of-the-doubt applies when the record is in approximate balance
Court: CAVC | Year: 1996 | Read Full Case Breakdown →
Key Takeaway
Summary
VA examiners later stated that there was insufficient information to determine a “definite” or “obvious” etiology for the seizure disorder. The Board denied the claim, concluding that the evidence favoring the veteran did not outweigh the evidence against the claim and characterizing the favorable private opinion as “rank speculation.”
The Court vacated the Board decision. First, the Court held that the Board improperly substituted its own medical judgment by dismissing the favorable medical opinion without citing independent medical evidence refuting it. The VA opinions merely stated that the exact etiology was unclear; they did not exclude the possibility that the disorder began during service as the private physician suggested.
Second, the Court held that the Board applied the wrong evidentiary standard. The Board effectively required the veteran to prove that favorable evidence outweighed negative evidence, contrary to the benefit-of-the-doubt framework established in Gilbert v. Derwinski. The Court reiterated that a claim should be granted when the evidence is in approximate balance and that the veteran need not prove the claim by a preponderance of the evidence.
Alemany became an important case reinforcing the proper evidentiary burden in VA claims adjudication and limiting the Board’s ability to reject favorable medical opinions without competent contradictory evidence.
Allen v. Brown, 7 Vet. App. 439 (1995) — Secondary service connection includes aggravation by a service-connected disability
Court: CAVC | Year: 1995 | Read Full Case Breakdown →
Key Takeaway
Summary
The veteran was service connected for traumatic arthritis of the right knee and later developed arthritis in the left knee and both hips. Multiple medical opinions addressed whether the service-connected right knee condition altered the veteran’s gait and aggravated the non-service-connected joint conditions. One VA examiner specifically concluded that the left knee and hip conditions were “definitely aggravated” by the service-connected right knee arthritis.
Despite this evidence, the Board denied secondary service connection because it focused narrowly on whether the service-connected right knee condition directly caused the onset of the additional joint disabilities. The Court rejected that restrictive interpretation and held that VA compensation law focuses on impairment of earning capacity and functional disability, not merely the original medical cause of a disease process.
The Court determined that when a service-connected condition aggravates another condition, the veteran is entitled to compensation for the additional degree of disability resulting from that aggravation. The Court explained that compensation is warranted for the incremental increase in impairment caused by the service-connected condition, even if the underlying non-service-connected condition originated independently.
Allen became one of the foundational secondary service connection precedents in veterans law and remains central to aggravation analysis under 38 C.F.R. § 3.310.
Amezquita v. Collins — Asymptomatic preexisting conditions may be noted at service entry under § 1111
Court: Federal Circuit | Year: 2025 | Read Full Case Breakdown →
Key Takeaway
Summary
The Federal Circuit agreed with the Veterans Court’s interpretation of § 1111. It explained that the statute does not limit defects, infirmities, or disorders noted at entry to conditions that were symptomatic at the time of the examination. The court held that an asymptomatic condition can be noted as preexisting under the presumption-of-soundness statute. The court then dismissed Amezquita’s argument that his condition had been resolved on entry because that challenge attacked factual findings beyond Federal Circuit jurisdiction under 38 U.S.C. § 7292(d)(2).
Andino v. Nicholson — Severance of service connection requires a medical certification based on all accumulated evidence
Court: Federal Circuit | Year: 2007 | Read Full Case Breakdown →
Key Takeaway
Summary
The court interpreted 38 C.F.R. § 3.105(d) to require that a change-in-diagnosis severance be supported by a medical certification made in light of all accumulated evidence. The court concluded that VA could not sever service connection on the basis of a medical opinion that reviewed only some of the evidence considered when the original award was made. The court emphasized that it was not reweighing evidence or making credibility determinations, but held that the Board and Veterans Court misread the regulation’s legal requirements. The case matters because it constrains severance practice and requires VA to ensure that any medical basis for severance addresses the full evidentiary record underpinning the original grant.
Annoni v. Brown — New and material evidence is reviewed de novo; lay repetition is cumulative
Court: CAVC | Year: 1993 | Read Full Case Breakdown →
Key Takeaway
Summary
The Court held that reopening under 38 U.S.C. § 5108 requires new and material evidence and that the reopening determination is reviewed de novo. Applying that standard, the Court concluded that the wife’s statements were cumulative of evidence already considered and, in any event, lay opinion could not competently establish the medical question of aggravation. The November 1989 VA psychiatric report was new but not material because it did not support in-service aggravation and, if anything, suggested the service period was not especially stressful. Because the claimant had not met the threshold reopening burden, the Court held that the benefit-of-the-doubt doctrine did not apply.
The Court also addressed the claimant’s bias argument, acknowledging that the rating specialist’s language in the statement of the case was inappropriate and inconsistent with VA’s ex parte adjudicatory obligations, but finding no evidence that it influenced the decision and thus no prejudicial error. Finally, the Court held that a CUE claim raised for the first time before the Court was not properly before it because there had been no final Board adjudication of that theory.
Arzio v. Shinseki — PTSD claims require credible supporting evidence of the in-service stressor under § 3.304(f)
Court: Federal Circuit | Year: 2010 | Read Full Case Breakdown →
Key Takeaway
Summary
The Federal Circuit rejected that argument. The court explained that § 3.304(f) is the specific regulation governing PTSD claims and expressly requires medical evidence diagnosing PTSD, a medical nexus to an in-service stressor, and credible supporting evidence that the stressor occurred. The court held that § 3.303 states only general service-connection principles and does not provide an alternative method for avoiding § 3.304(f)’s specific evidentiary requirements. Applying the canon that the specific governs the general, the court affirmed the denial of benefits. The decision is important because it reinforces that PTSD claims must be proven under the PTSD-specific regulation, and general service-connection language cannot substitute for stressor corroboration.
Ashley v. Brown — Board must provide adequate reasons or bases and may not rely on its own medical judgment in cause-of-death/PTSD analysis
Court: CAVC | Year: 1993 | Read Full Case Breakdown →
Key Takeaway
Summary
The Court vacated the Board decision and remanded. It held that the Board failed to provide adequate reasons or bases under 38 U.S.C. § 7104(d)(1) because it did not meaningfully address favorable stressor evidence, lay testimony, and supporting statements from family and friends. The Court also held that the Board erred by effectively making its own medical judgment about whether the veteran’s alcohol dependence could be related to PTSD, contrary to Colvin. In addition, the Court found the claimant had submitted competent evidence sufficient to make the claim plausible, and it emphasized the need to consider the benefit-of-the-doubt doctrine and, if necessary, seek an advisory medical opinion. The case matters because it reinforces that the Board must confront favorable evidence directly and cannot deny a medically complex theory without independent medical support.
Ashmore v. Derwinski — BVA must provide adequate reasons or bases and address reasonably raised claims
Court: CAVC | Year: 1991 | Read Full Case Breakdown →
Key Takeaway
Summary
The Court vacated and remanded the denials involving maxillary sinusitis and cerebral concussion because the Board failed to make explicit credibility findings regarding Ashmore’s sworn testimony describing headaches, drainage, dizziness, and insomnia. The Court explained that when such testimony could support entitlement under the applicable diagnostic codes, the Board must address credibility and provide adequate reasons or bases for rejecting it. The Court also held that the Board erred by failing to address Ashmore’s expressly raised claim for service connection for a psychological disorder, which the record reasonably presented and which the Board overlooked altogether. The decision underscores both the Board’s reasons-or-bases obligations and its duty to address issues plainly raised by the claimant and the record.
AZ v. Shinseki — Absence of unreported sexual assault records is not pertinent evidence
Court: Federal Circuit | Year: 2013 | Read Full Case Breakdown →
Key Takeaway
Summary
The Federal Circuit rejected VA’s reliance on the absence of official reporting as negative evidence. The court explained that sexual assaults are frequently unreported and that silence in service records therefore lacks meaningful probative value regarding whether the assault actually occurred.
The court reviewed military and scientific studies documenting widespread underreporting of sexual assault and concluded that the Board errs when it treats the lack of official documentation as substantive evidence against the occurrence of MST.
AZ significantly strengthened evidentiary protections for MST claimants and reinforced the need for careful evaluation of lay evidence, behavioral changes, and alternative corroborating evidence in personal-assault PTSD claims.
Bagby v. Derwinski — Clear and unmistakable evidence rebutted presumption of soundness
Court: CAVC | Year: 1991 | Read Full Case Breakdown →
Key Takeaway
Summary
The Court explained that the presumption of soundness applies when an induction examination does not note the claimed condition, but that the presumption may be overcome by clear and unmistakable evidence of preexistence. The Court also addressed the standard of review, holding that whether the established facts satisfy the statutory clear-and-unmistakable-evidence standard is a legal determination subject to de novo review. Applying that standard, the Court relied on service hospital records describing the ulcer as chronic and old, along with a pre-service physician statement documenting treatment for peptic ulcer symptoms before service. On that basis, the Court concluded that the presumption was rebutted and affirmed the Board.
The case is important because it confirms both the evidentiary threshold for rebutting the presumption of soundness and the appellate court’s willingness to independently review whether the legal standard was met, rather than deferring entirely to the Board’s conclusion.
Bailey v. Derwinski — Board must review reopened claim evidence as a whole and explain reasons for rejecting favorable medical evidence
Court: CAVC | Year: 1991 | Read Full Case Breakdown →
Key Takeaway
Summary
On the right shoulder, the Court reversed the Board’s denial. It found the Board’s conclusion that the right shoulder arthritis was degenerative rather than traumatic was arbitrary and capricious because the Board treated very similar evidence differently from the evidence supporting the wrist award, without a rational explanation. The Court also emphasized that the record contained early complaints of right shoulder pain and medical opinions suggesting prior trauma. For the knees, hips, spine, left ankle, and left shoulder, the Court vacated and remanded because the Board provided only a conclusory statement, failed to explain why favorable medical evidence was unpersuasive, and did not adequately state reasons or bases under 38 U.S.C. § 7104(d)(1).
Barfield v. Brown — New and material evidence must be relevant and noncumulative to reopen a claim
Court: CAVC | Year: 1993 | Read Full Case Breakdown →
Key Takeaway
Summary
The Court explained that under 38 U.S.C.A. § 5108, a disallowed claim must be reopened only when new and material evidence is presented. Applying Colvin, the Court stated that material evidence must be relevant and probative of the issue at hand and that new evidence cannot be merely cumulative. Barfield’s submitted 1981 examination record confirmed alcoholism in service, but that fact had already been before the Board and the report did not address liver disease or the cause of death. The Court therefore held that the evidence was not material.
The Court also rejected Barfield’s personal belief that alcoholism caused her husband’s death, noting that as a lay witness she was not competent to render a medical causation opinion. The Court affirmed the Board’s refusal to reopen without reaching any broader question about whether chronic alcoholism itself could be service connected.
Barr v. Nicholson — Lay testimony may establish observable varicose veins and continuity of symptomatology
Court: CAVC | Year: 2007 | Read Full Case Breakdown →
Key Takeaway
Summary
The Court found the VA examination inadequate because the examiner failed to meaningfully address whether the veteran’s current varicose veins were related to the observable symptoms described during and after service. The Court emphasized that once VA elects to provide a medical examination, the duty to assist requires that the examination be adequate for adjudication purposes.
The Court also discussed the competency of lay evidence. It explained that varicose veins are a condition capable of lay observation because they are visually observable and identifiable without specialized medical training. Therefore, the veteran’s testimony concerning continuity of symptoms was competent evidence that required proper consideration.
Barr became one of the foundational veterans-law cases governing adequacy of VA examinations and the competency of lay evidence concerning observable conditions.
Bastien v. Shinseki — Federal Circuit lacks jurisdiction to reweigh factual evidence; Rizzo controls VA expert competency challenge
Court: Federal Circuit | Year: 2010 | Read Full Case Breakdown →
Key Takeaway
Summary
Baughman v. Derwinski — A rating decision may establish service connection, and severance requires 38 C.F.R. § 3.105(d) safeguards
Court: CAVC | Year: 1991 | Read Full Case Breakdown →
Key Takeaway
Summary
The Court focused on the legal effect of the 1986 rating decision. It held that the rating action, as a matter of law, granted service connection for ischemic heart disease because VA expressly relied on the symptoms of that disease when assigning the increased rating. The Court further held that the Board’s later denial necessarily amounted to an attempted severance of that grant, but VA had not complied with the procedural safeguards or burden of proof required by 38 C.F.R. § 3.105(d). Because service connection had already been established and had not been properly severed, the Board erred in denying the downstream cardiovascular, vascular, and amputation claims. The Court reversed and remanded for further proceedings.
Beno v. Principi — Personality disorders are not compensable disabilities; anxiety rating affirmed under clear-error review
Court: CAVC | Year: 1992 | Read Full Case Breakdown →
Key Takeaway
Summary
On the service-connection issue, the Court agreed that personality disorders are not disabilities for VA compensation purposes under the governing regulations. On the rating issue, the Court reviewed the Board’s factual determination under the clearly erroneous standard and concluded that the record plausibly supported the finding that the service-connected anxiety reaction was only mildly disabling. The Court also noted that any unemployability theory based on the service-connected condition would not be supported on this record and that a pension theory was not before the Board. The decision is a straightforward application of the noncompensability of personality disorders and appellate deference to supported Board factfinding.
Biggins v. Derwinski — Active duty for training does not trigger the multiple-sclerosis presumption unless disabled from a disease or injury incurred in line of duty
Court: CAVC | Year: 1991 | Read Full Case Breakdown →
Key Takeaway
Summary
The Court also addressed the appellant’s alternative argument that she could invoke the seven-year presumption for multiple sclerosis. The Court interpreted 38 U.S.C. §§ 101(24), 101(2), 312, and 337 to mean that presumptive service connection under those statutes applies only to a veteran whose service qualifies as active military, naval, or air service. For a period of active duty for training to count, the claimant must have been disabled from a disease or injury incurred or aggravated in line of duty during that period. Because the appellant had no other qualifying disability during training, her active duty for training did not satisfy the statutory definition of active service, and the presumption was unavailable as a matter of law. The decision thus clarifies the distinct statutory role of veteran status, qualifying service, and presumptive service connection.
Bilharz v. Collins — Due process does not categorically require the same Board member to hear and decide an AMA appeal
Court: CAVC | Year: 2025 | Read Full Case Breakdown →
Key Takeaway
Summary
Second, the Court held that the hearing duties recognized in Bryant continue to apply in AMA Board hearings, even though the regulatory anchor changed from 38 C.F.R. § 3.103(c)(2) to § 20.705. The Court relied on the nonexclusive language of § 20.705 and VA’s rulemaking commentary stating that the AMA amendments were not intended to limit Bryant. Applying that rule, the Court found that the Board member who conducted Mr. Pinto’s hearing did not fulfill the duty to explain the issues or suggest the submission of potentially advantageous evidence, so Pinto’s PTSD and TDIU appeal was remanded.
Finally, the Court agreed with Mr. Bilharz that the Board’s reasons or bases were inadequate because it dismissed his lay testimony with conclusory statements about competency without clearly addressing credibility or explaining the treatment of favorable evidence. The Court therefore remanded Bilharz’s service-connection claims as well.