AI-summarized from official sources and checked against the source text. Each item links to the official page.
In this update: 7 procedural, 3 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 April 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.
Apr 2, 2026 · M21-1 V.ii.4.ALink to “Apr 2, 2026 · M21-1 V.ii.4.A”
Unclear — check the official pageWhy: We couldn't confirm the effect on veterans from the official text.
What changed. M21-1, Part V, Subpart ii, Chapter 4, Section A - Effective Dates Updated guidance on effective dates based on liberalizing law changes.
Source quotes
M21-1, Part V, Subpart ii, Chapter 4, Section A - Effective Dates
Updated guidance on effective dates based on liberalizing law changes.
Official source (external site)
Apr 9, 2026 · M21-1 VIII.ii.1.BLink to “Apr 9, 2026 · M21-1 VIII.ii.1.B”
Procedural / no direct effectWho: Persian Gulf War veterans (internal VA claims processing)Why: This is an internal VA claims-processor manual update that moves and revises pre-discharge examination instructions. The visible text sets no new eligibility, benefit, deadline, or filing requirement for Persian Gulf veterans, so the practical effect on them is nil.
What changed. M21-1, Part VIII, Subpart ii, Chapter 1, Section B - Developing Presumptive Service Connection (SC) Claims from Persian Gulf Veterans Updated to relocate and revise pre-discharge examination instructions.
Source quotes
M21-1, Part VIII, Subpart ii, Chapter 1, Section B - Developing Presumptive Service Connection (SC) Claims from Persian Gulf Veterans
Updated to relocate and revise pre-discharge examination instructions.
Official source (external site)
Apr 13, 2026 · M21-1 VIII.iii.3.ALink to “Apr 13, 2026 · M21-1 VIII.iii.3.A”
Procedural / no direct effectWho: Veterans claiming service connection for mustard gas or Lewisite exposureWhy: This is an update to internal VA claims-processor instructions for mustard gas and Lewisite exposure claims (routing to Muskogee RO, development letters, verifying full-body exposure). The excerpt describes no new benefit, eligibility rule, or filing requirement for veterans, so the practical effect cannot be identified as better or worse.
What changed. M21-1, Part VIII, Subpart iii, Chapter 3, Section A - Developing Claims for Service Connection (SC) for Disabilities Resulting From Exposure to Mustard Gas or Lewisite Updated mustard gas and Lewisite development procedures.
Source quotes
M21-1, Part VIII, Subpart iii, Chapter 3, Section A - Developing Claims for Service Connection (SC) for Disabilities Resulting From Exposure to Mustard Gas or Lewisite
Updated mustard gas and Lewisite development procedures.
Official source (external site)
Apr 13, 2026 · M21-1 VIII.iii.3.BLink to “Apr 13, 2026 · M21-1 VIII.iii.3.B”
Procedural / no direct effectWho: veterans with mustard gas or Lewisite exposure claimsWhy: This is an update to internal VA rating instructions for mustard gas and Lewisite claims. The source text does not say it changes who qualifies or what benefits are paid. It restates the existing presumptive conditions and tells raters how to code and explain decisions.
What changed. M21-1, Part VIII, Subpart iii, Chapter 3, Section B - Rating Claims for Disabilities Associated With Mustard Gas or Lewisite Exposure Updated mustard gas and Lewisite rating procedures.
Source quotes
M21-1, Part VIII, Subpart iii, Chapter 3, Section B - Rating Claims for Disabilities Associated With Mustard Gas or Lewisite Exposure
Updated mustard gas and Lewisite rating procedures.
Official source (external site)
Apr 20, 2026 · M21-1 IV.i.2.ALink to “Apr 20, 2026 · M21-1 IV.i.2.A”
Procedural / no direct effectWhy: This is an internal VA claims-processing manual update that adds staff guidance on Examination Scheduling Requests (ESRs) in VBMS. It does not change what benefits veterans can get, what they must submit, or deadlines.
What changed. M21-1, Part IV, Subpart i, Chapter 2, Section A - Examination Requests Overview Updated to add guidance on ESRs
Source quotes
M21-1, Part IV, Subpart i, Chapter 2, Section A - Examination Requests Overview
Updated to add guidance on ESRs
Official source (external site)
Apr 20, 2026 · M21-1 IX.i.3.DLink to “Apr 20, 2026 · M21-1 IX.i.3.D”
Unclear — check the official pageWho: Survivors and claimants claiming last illness or final expenses on Pension or Survivors PensionWhy: We couldn't confirm the effect on veterans from the official text.
What changed. M21-1, Part IX, Subpart i, Chapter 3, Section D - Reduction of Income Due to Unreimbursed Expenses Updated to clarify the perimeters of bore the expense as it pertains to UMEs claimed as last illness or final expenses on a pension or Survivors Pension claim.
Source quotes
M21-1, Part IX, Subpart i, Chapter 3, Section D - Reduction of Income Due to Unreimbursed Expenses
Updated to clarify the perimeters of bore the expense as it pertains to UMEs claimed as last illness or final expenses on a pension or Survivors Pension claim.
Official source (external site)
Apr 20, 2026 · M21-1 IX.iii.1.KLink to “Apr 20, 2026 · M21-1 IX.iii.1.K”
Unclear — check the official pageWho: surviving spouses and children claiming Survivors Pension final expense deductionsWhy: We couldn't confirm the effect on veterans from the official text.
What changed. M21-1, Part IX, Subpart iii, Chapter 1, Section K - Other Deductible Expenses Updated to clarify the perimeters of bore the expense as it pertains to UMEs claimed as last illness or final expenses on a pension or Survivors Pension claim.
Source quotes
M21-1, Part IX, Subpart iii, Chapter 1, Section K - Other Deductible Expenses
Updated to clarify the perimeters of bore the expense as it pertains to UMEs claimed as last illness or final expenses on a pension or Survivors Pension claim.
Official source (external site)
Apr 20, 2026 · M21-1 XII.i.1.BLink to “Apr 20, 2026 · M21-1 XII.i.1.B”
Procedural / no direct effectWho: surviving spouses and children applying for DIC and Survivors PensionWhy: This is an internal VA claims-processing manual update on how staff handle Survivors Pension applications that arrive without income and net worth information. Staff send a standard letter, and survivors keep their original claim date if they return a completed application within one year. The text does not create or remove any benefit.
What changed. M21-1, Part XII, Subpart i, Chapter 1, Section B - Common Dependency and Indemnity Compensation (DIC) Processing Issues Updated to provide guidance on handling incomplete Survivors Pension applications.
Source quotes
M21-1, Part XII, Subpart i, Chapter 1, Section B - Common Dependency and Indemnity Compensation (DIC) Processing Issues
Updated to provide guidance on handling incomplete Survivors Pension applications.
Official source (external site)
Apr 27, 2026 · M21-1 VIII.iii.10Link to “Apr 27, 2026 · M21-1 VIII.iii.10”
Procedural / no direct effectWhy: This is a reorganization of the VA claims manual: content moved from Chapter 10 to Chapter 11, and the emptied chapter is marked historical. No benefits, eligibility, deadlines, or filing requirements change for veterans or survivors.
What changed. M21-1, Part VIII, Subpart iii, Chapter 10 - Historical Updated to remove content for relocation to VIII.iii.11 and mark the remaining empty location as historical. Chapter 10 is being reserved for future use.
Source quotes
M21-1, Part VIII, Subpart iii, Chapter 10 - Historical
Updated to remove content for relocation to VIII.iii.11 and mark the remaining empty location as historical.
Chapter 10 is being reserved for future use.
Official source (external site)
Apr 27, 2026 · M21-1 VIII.iii.11Link to “Apr 27, 2026 · M21-1 VIII.iii.11”
Procedural / no direct effectWho: Veterans and survivors with COVID-19 claims (no change in practice)Why: The COVID-19 presumptive service connection guidance was moved from the old chapter VIII.iii.10 into a new chapter VIII.iii.11 in the VA adjudication manual. The text describes existing rules, so no new benefits, eligibility, or requirements for veterans result from this update.
What changed. M21-1, Part VIII, Subpart iii, Chapter 11 - Presumptive Service Connection (SC) for Coronavirus Disease (COVID-19) Updated to add new chapter for COVID-19 guidance, directly relocated from old VIII.iii.10.
Source quotes
M21-1, Part VIII, Subpart iii, Chapter 11 - Presumptive Service Connection (SC) for Coronavirus Disease (COVID-19)
Updated to add new chapter for COVID-19 guidance, directly relocated from old VIII.iii.10.
Official source (external site)
Full list: 2026 M21-1 Changes by Date on KnowVA (external site)