AI-summarized from official sources and checked against the source text. Each item links to the official page.
In this update: 1 good, 7 procedural, 2 unclear.
The M21-1 is the manual VA claims processors follow. VA lists every update on its KnowVA "Changes by Date" page. These are the May 2026 updates that relate to benefits we cover.
These updates change how VA processes claims. They do not change the benefit amounts or rules on our pages; those come only from the law and official benefit pages.
May 1, 2026 · M21-1 IV.i.1.BLink to “May 1, 2026 · M21-1 IV.i.1.B”
Unclear — check the official pageWho: veterans with pending disability claimsWhy: We couldn't confirm the effect on veterans from the official text.
What changed. M21-1, Part IV, Subpart i, Chapter 1, Section B - Evidentiary Standards for Finding an Examination or Opinion Necessary Updated guidance on determining the need for examination or medical opinion in claims involving aggravation of an NSC disability by an SC disability.
Source quotes
M21-1, Part IV, Subpart i, Chapter 1, Section B - Evidentiary Standards for Finding an Examination or Opinion Necessary
Updated guidance on determining the need for examination or medical opinion in claims involving aggravation of an NSC disability by an SC disability.
Official source (external site)
May 1, 2026 · M21-1 V.ii.2.DLink to “May 1, 2026 · M21-1 V.ii.2.D”
Good for veteransWho: Veterans claiming service connection for a non-service-connected disability aggravated by a service-connected oneWhy: VA raters will now use the broader "but-for" causation test and will no longer count the natural progression of the non-service-connected condition against a claim that a service-connected disability aggravated it. Permanent worsening is not required, and treatment interference counts, so more veterans with secondary aggravation claims could be granted service connection.
What changed. M21-1, Part V, Subpart ii, Chapter 2, Section D - Secondary Service Connection (SC) and Aggravation of Non-Service-Connected (NSC) Disabilities Updated to incorporate the holding in Spicer v. McDonough and to revise and clarify guidance on aggravation of an NSC disability by an SC disability (Allen aggravation).
Source quotes
M21-1, Part V, Subpart ii, Chapter 2, Section D - Secondary Service Connection (SC) and Aggravation of Non-Service-Connected (NSC) Disabilities
Updated to incorporate the holding in Spicer v.
McDonough and to revise and clarify guidance on aggravation of an NSC disability by an SC disability (Allen aggravation).
Official source (external site)
May 1, 2026 · M21-1 V.ii.3.ALink to “May 1, 2026 · M21-1 V.ii.3.A”
Unclear — check the official pageWho: Veterans claiming secondary service connection or aggravationWhy: We couldn't confirm the effect on veterans from the official text.
What changed. M21-1, Part V, Subpart ii, Chapter 3, Section A - Determining the Issues Updated language regarding secondary SC and aggravation of an NSC disability by an SC disability in accordance with the holding in Spicer v.
Source quotes
M21-1, Part V, Subpart ii, Chapter 3, Section A - Determining the Issues
Updated language regarding secondary SC and aggravation of an NSC disability by an SC disability in accordance with the holding in Spicer v.
Official source (external site)
May 1, 2026 · M21-1 V.ii.3.CLink to “May 1, 2026 · M21-1 V.ii.3.C”
Procedural / no direct effectWhy: This is a wording update to an example in the VA adjudication manual so it matches the Spicer v. McDonough holding. No benefit, eligibility rule, or filing requirement changes for veterans or claimants.
What changed. M21-1, Part V, Subpart ii, Chapter 3, Section C - Reviewing Diagnoses Updated language in an example to align with the holding in Spicer v.
Source quotes
M21-1, Part V, Subpart ii, Chapter 3, Section C - Reviewing Diagnoses
Updated language in an example to align with the holding in Spicer v.
Official source (external site)
May 1, 2026 · M21-1 VIII.iv.6.CLink to “May 1, 2026 · M21-1 VIII.iv.6.C”
Procedural / no direct effectWho: veterans and survivors with 38 U.S.C. 1151 claimsWhy: This is an internal manual update that changes the wording of an example to match a court decision (Spicer v. McDonough). The rules on offsetting 38 U.S.C. 1151 compensation against tort judgments or settlements stay the same, so veterans see no practical change.
What changed. M21-1, Part VIII, Subpart iv, Chapter 6, Section C - Authorization of Awards Under 38 U.S.C. 1151 Updated language in an example to align with the holding in Spicer v.
Source quotes
M21-1, Part VIII, Subpart iv, Chapter 6, Section C - Authorization of Awards Under 38 U.S.C. 1151
Updated language in an example to align with the holding in Spicer v.
Official source (external site)
May 7, 2026 · M21-1 X.i.4.DLink to “May 7, 2026 · M21-1 X.i.4.D”
Procedural / no direct effectWho: Veterans and survivors with Philippine service-based claimsWhy: This manual update only removes an outdated passage on which office has jurisdiction to pay compensation and DIC in Philippine-service cases, because the same guidance already appears in another section. Eligibility, payment rates and what claimants must do are unchanged.
What changed. M21-1, Part X, Subpart i, Chapter 4, Section D - Awards and Payments for Benefits Due to Philippine Service Updated to delete obsolete guidance regarding jurisdiction for payment of compensation and DIC as relevant guidance is now located in X.i.4.A.1.a.
Source quotes
M21-1, Part X, Subpart i, Chapter 4, Section D - Awards and Payments for Benefits Due to Philippine Service
Updated to delete obsolete guidance regarding jurisdiction for payment of compensation and DIC as relevant guidance is now located in X.i.4.A.1.a.
Official source (external site)
May 13, 2026 · M21-1 X.ii.5.BLink to “May 13, 2026 · M21-1 X.ii.5.B”
Procedural / no direct effectWho: veterans whose service connection is proposed for severance (VA claims processors affected directly)Why: This is an update to internal VA staff instructions on how raters process severance of service connection (reviewer approval, writing the decision narrative, updating codesheets). It restates existing legal standards such as the clear and unmistakable error requirement and due process, and does not change what veterans are entitled to or must do.
What changed. M21-1, Part X, Subpart ii, Chapter 5, Section B - Severance of Service Connection (SC) Updated guidance on severance of SC.
Source quotes
M21-1, Part X, Subpart ii, Chapter 5, Section B - Severance of Service Connection (SC)
Updated guidance on severance of SC.
Official source (external site)
May 22, 2026 · M21-1 XI.ii.3.ELink to “May 22, 2026 · M21-1 XI.ii.3.E”
Procedural / no direct effectWho: survivors and substitute claimants (indirectly, via VA staff processing)Why: This is an update to VA's internal claims-processing manual, clarifying how staff control and close out supplemental claims and higher-level reviews tied to accrued benefits and substitution. It does not change who qualifies, how much is paid, or what a survivor must do.
What changed. M21-1, Part XI, Subpart ii, Chapter 3, Section E - Accrued Authorization and Notification Updated to clarify EP control and disposition for supplemental claims and higher level reviews associated with accrued benefits and substitution claims.
Source quotes
M21-1, Part XI, Subpart ii, Chapter 3, Section E - Accrued Authorization and Notification
Updated to clarify EP control and disposition for supplemental claims and higher level reviews associated with accrued benefits and substitution claims.
Official source (external site)
May 27, 2026 · M21-1 IV.i.2.ALink to “May 27, 2026 · M21-1 IV.i.2.A”
Procedural / no direct effectWhy: This is an internal VA claims-processing manual update that adds an exception for higher-level review (HLR) returns to the guidance on complex medical opinions. The visible text gives no new benefit, eligibility, or deadline for veterans, and the exact effect of the exception is not shown.
What changed. M21-1, Part IV, Subpart i, Chapter 2, Section A - Examination Requests Overview Updated guidance on complex medical opinions to add an exception for HLR returns.
Source quotes
M21-1, Part IV, Subpart i, Chapter 2, Section A - Examination Requests Overview
Updated guidance on complex medical opinions to add an exception for HLR returns.
Official source (external site)
May 27, 2026 · M21-1 V.iii.13Link to “May 27, 2026 · M21-1 V.iii.13”
Procedural / no direct effectWho: veterans claiming service connection for insomnia or mental disordersWhy: This is an internal VA manual update that reorganizes and rewords the guidance raters use when considering service connection for insomnia. The excerpt shows no new eligibility, rating, or filing requirement for veterans.
What changed. M21-1, Part V, Subpart iii, Chapter 13 - Mental Disorders Updated to reorganize and clarify the guidance on considering SC for insomnia.
Source quotes
M21-1, Part V, Subpart iii, Chapter 13 - Mental Disorders
Updated to reorganize and clarify the guidance on considering SC for insomnia.
Official source (external site)
Full list: 2026 M21-1 Changes by Date on KnowVA (external site)