VA BENEFITS REFERENCE
Monoclonal Gammopathy Of Undetermined Significance (MGUS) Presumptive Reference
Official presumptive service rules for Monoclonal gammopathy of undetermined significance (MGUS), including listed locations, dates, criteria and sources.
VA lists the following pathways for Monoclonal gammopathy of undetermined significance (MGUS). Each row retains its own dates and limitations. Listing a condition does not decide an individual award.
| Condition | Exposure | Listed Service Locations | Service Dates | Criteria And Sources |
|---|---|---|---|---|
| Monoclonal gammopathy of undetermined significance (MGUS) | Burn Pits and Particulates | Southwest Asia theater and Somalia under the 2025 cancer rules | On or after August 2, 1990 | The regulation lists this condition without a specified post-service manifestation deadline. Expressly included within the rule for multiple myelomas. Affirmative evidence of a different cause, non-service origin or willful misconduct can rebut the presumption. Active service assigned to a duty station in Somalia or Iraq, Kuwait, Saudi Arabia, the neutral zone between Iraq and Saudi Arabia, Bahrain, Qatar, the United Arab Emirates, Oman, the Gulf of Aden, the Gulf of Oman, the Persian Gulf, the Arabian Sea and the Red Sea, including their airspace. |
| Monoclonal gammopathy of undetermined significance (MGUS) | Burn Pits and Particulates | Afghanistan, Djibouti, Egypt, Jordan, Lebanon, Syria, Uzbekistan and Yemen under the 2025 rules | On or after September 11, 2001 | The regulation lists this condition without a specified post-service manifestation deadline. Expressly included within the rule for multiple myelomas. Affirmative evidence of a different cause, non-service origin or willful misconduct can rebut the presumption. Active service assigned to a duty station in a listed country, including its airspace. |
| Monoclonal gammopathy of undetermined significance (MGUS) | Agent Orange | Republic of Vietnam and inland waterways | January 9, 1962 through May 7, 1975 | VA lists this statutory condition for qualifying herbicide exposure. Section 1116(a)(2) gives no condition-specific onset deadline for this category; remaining benefit requirements and rebuttal rules apply. Qualifying service in Vietnam, including its inland waterways; no minimum period is specified. 38 U.S.C. 1116, 1116A, 1116B; 38 CFR 3.307 and 3.309. Verified 2026-10-25. Source 1 · Source 2 · Source 3 · Source 4 |
| Monoclonal gammopathy of undetermined significance (MGUS) | Agent Orange | Specified offshore waters of Vietnam | January 9, 1962 through May 7, 1975 | VA lists this statutory condition for qualifying herbicide exposure. Section 1116(a)(2) gives no condition-specific onset deadline for this category; remaining benefit requirements and rebuttal rules apply. Vessel service within the statutory area extending no more than 12 nautical miles seaward of the Vietnam-Cambodia demarcation line and the coordinates in 38 U.S.C. 1116A(d). It is not a generic 12-mile distance from any coastline. 38 U.S.C. 1116, 1116A, 1116B; 38 CFR 3.307 and 3.309. Verified 2026-10-25. Source 1 · Source 2 · Source 3 · Source 4 · Source 5 |
| Monoclonal gammopathy of undetermined significance (MGUS) | Agent Orange | U.S. or Royal Thai military bases in Thailand | January 9, 1962 through June 30, 1976 | VA lists this statutory condition for qualifying herbicide exposure. Section 1116(a)(2) gives no condition-specific onset deadline for this category; remaining benefit requirements and rebuttal rules apply. Service at any U.S. or Royal Thai base, without a perimeter-duty or military-specialty restriction under the statute. 38 U.S.C. 1116, 1116A, 1116B; 38 CFR 3.307 and 3.309. Verified 2026-10-25. Source 1 · Source 2 · Source 3 · Source 4 |
| Monoclonal gammopathy of undetermined significance (MGUS) | Agent Orange | Laos | December 1, 1965 through September 30, 1969 | VA lists this statutory condition for qualifying herbicide exposure. Section 1116(a)(2) gives no condition-specific onset deadline for this category; remaining benefit requirements and rebuttal rules apply. Covered active service in Laos. 38 U.S.C. 1116, 1116A, 1116B; 38 CFR 3.307 and 3.309. Verified 2026-10-25. Source 1 · Source 2 · Source 3 · Source 4 |
| Monoclonal gammopathy of undetermined significance (MGUS) | Agent Orange | Mimot or Krek, Kampong Cham Province, Cambodia | April 16, 1969 through April 30, 1969 | VA lists this statutory condition for qualifying herbicide exposure. Section 1116(a)(2) gives no condition-specific onset deadline for this category; remaining benefit requirements and rebuttal rules apply. The statutory location is limited to Mimot or Krek in Kampong Cham Province. 38 U.S.C. 1116, 1116A, 1116B; 38 CFR 3.307 and 3.309. Verified 2026-10-25. Source 1 · Source 2 · Source 3 · Source 4 |
| Monoclonal gammopathy of undetermined significance (MGUS) | Agent Orange | Guam, American Samoa and their territorial waters | January 9, 1962 through July 31, 1980 | VA lists this statutory condition for qualifying herbicide exposure. Section 1116(a)(2) gives no condition-specific onset deadline for this category; remaining benefit requirements and rebuttal rules apply. Covered active service in either territory or its territorial waters. The statute and current VA disability page specify July 31. 38 U.S.C. 1116, 1116A, 1116B; 38 CFR 3.307 and 3.309. Verified 2026-10-25. Source 1 · Source 2 · Source 3 · Source 4 |
| Monoclonal gammopathy of undetermined significance (MGUS) | Agent Orange | Johnston Atoll and ships calling there | January 1, 1972 through September 30, 1977 | VA lists this statutory condition for qualifying herbicide exposure. Section 1116(a)(2) gives no condition-specific onset deadline for this category; remaining benefit requirements and rebuttal rules apply. Service on Johnston Atoll or aboard a ship that called at the atoll. 38 U.S.C. 1116, 1116A, 1116B; 38 CFR 3.307 and 3.309. Verified 2026-10-25. Source 1 · Source 2 · Source 3 · Source 4 |
| Monoclonal gammopathy of undetermined significance (MGUS) | Agent Orange | In or near the Korean Demilitarized Zone | September 1, 1967 through August 31, 1971 | VA lists this statutory condition for qualifying herbicide exposure. Section 1116(a)(2) gives no condition-specific onset deadline for this category; remaining benefit requirements and rebuttal rules apply. The current statutory window in 38 U.S.C. 1116B is used. The older April 1968 starting date still printed in 38 CFR 3.307 is not used to narrow it. 38 U.S.C. 1116, 1116A, 1116B; 38 CFR 3.307 and 3.309. Verified 2026-10-25. Source 1 · Source 2 · Source 3 · Source 4 · Source 5 |
| Monoclonal gammopathy of undetermined significance (MGUS) | Agent Orange | Affected C-123 aircraft and associated Air Force units | Unit-specific dates in VA tables span 1962 through 1986; verify the particular assignment period | VA lists this statutory condition for qualifying herbicide exposure. Section 1116(a)(2) gives no condition-specific onset deadline for this category; remaining benefit requirements and rebuttal rules apply. Requires regular, repeated operation, maintenance or onboard service involving affected aircraft, with the Air Force or Reserve squadron and flight, ground-maintenance or medical duties described in 38 CFR 3.307(a)(6)(v). A listed year or base alone is insufficient. 38 U.S.C. 1116, 1116A, 1116B; 38 CFR 3.307 and 3.309. Verified 2026-10-25. Source 1 · Source 2 · Source 3 · Source 4 · Source 5 |
Read The Exposure Rules
Official Sources
Last verified 2026-10-25. Source publication or legal effective dates are shown separately where available.
- www.ecfr.gov/current/title-38/section-3.320b
- www.ecfr.gov/current/title-38/section-3.320a
- www.va.gov/disability/eligibility/hazardous-materials-exposure/agent-orange/
- uscode.house.gov/us/usc/119-124/t38/s1116/
- www.ecfr.gov/current/title-38/section-3.307
- www.ecfr.gov/current/title-38/section-3.309
- uscode.house.gov/us/usc/119-124/t38/s1116A/
- uscode.house.gov/us/usc/119-124/t38/s1116B/
- www.va.gov/resources/c-123-aircraft-agent-orange-exposure-and-disability-compensation/
Check The Source. Get Accredited Help.
Use this resource to understand published information. VA and the official decision control individual benefits.