Hypothyroidism: VA Presumptive Condition (Agent Orange)
VeteranHQ lists Hypothyroidism as a presumptive condition in the Agent Orange and Other Herbicides group. The exposure it is tied to is: Herbicide Agent (Agent Orange/TCDD). The presumption is effective January 19, 2021. It is governed by 38 CFR § 3.309(e); FY21 NDAA Section 3612; 86 FR 4996 (January 19, 2021).
A presumption removes one requirement and one only: the veteran does not have to prove a medical link between the condition and service. Everything else still applies. There must be a current diagnosis, the service has to meet the requirements below, and VA decides the claim on the evidence in the record.
What qualifies: Hypothyroidism
- Service era
- Vietnam Era (August 5, 1964 – May 7, 1975); Korean DMZ; Thailand
- Service location
- Republic of Vietnam, Thailand (specified bases), Korean DMZ, Johnston Island
- Exposure
- Herbicide Agent (Agent Orange/TCDD)
- Effective date
- January 19, 2021
- Filing deadline
- No statutory deadline for Agent Orange presumptives
- Diagnostic code
- 7900
Service required for this presumption
Service in the Republic of Vietnam between January 9, 1962, and May 7, 1975, or other qualifying herbicide exposure locations. No minimum service duration required.
About this presumption
Hypothyroidism (underactive thyroid) is recognized as a presumptive condition for veterans exposed to Agent Orange/tactical herbicides, added by the FY21 National Defense Authorization Act. TCDD and related dioxins disrupt thyroid hormone synthesis and metabolism through aryl hydrocarbon receptor (AhR) activation, induction of CYP1A1/1A2 enzymes that accelerate thyroid hormone catabolism, and direct thyroid cell toxicity. Rated based on fatigability, constipation, cold intolerance, mental sluggishness, muscular weakness, cardiovascular involvement, mental disturbance, bradycardia, sleepiness, and weight gain. Subclinical hypothyroidism (elevated TSH with normal free T4) may qualify if symptomatic.
Evidence still needed
A presumption does not remove the evidence requirement. VA still needs a current diagnosis from a medical provider and service records that show the qualifying service above. What it removes is the medical opinion connecting the two.
Service records confirming qualifying herbicide exposure location; thyroid function tests documenting elevated TSH and/or low free T4; endocrinology or primary care records; medication records (levothyroxine therapy); symptoms diary if available; anti-thyroid antibody testing (anti-TPO, anti-thyroglobulin) to distinguish Hashimoto thyroiditis from TCDD-induced hypothyroidism (either may qualify).
Controlling legal authority
38 CFR § 3.309(e); FY21 NDAA Section 3612; 86 FR 4996 (January 19, 2021)
Related on VeteranHQ
- Hyperthyroidism (Graves' Disease): 38 CFR Part 4 rating criteriaThe percentage tiers VA applies once service connection is established, under DC 7900.
- VA presumptive conditions, explainedHow presumptive service connection works, and what it does not cover.
- All presumptive conditions by exposureAgent Orange, PACT Act, Camp Lejeune, Gulf War, and ionizing radiation.
Questions About Hypothyroidism and Presumptive Service Connection
Is Hypothyroidism a VA presumptive condition?
Yes. VeteranHQ lists Hypothyroidism as presumptive in the Agent Orange and Other Herbicides group, effective January 19, 2021, under 38 CFR § 3.309(e); FY21 NDAA Section 3612; 86 FR 4996 (January 19, 2021). A presumption removes the requirement to prove a medical link to service. A current diagnosis and qualifying service are still required, and VA decides the claim.
What service qualifies for the Hypothyroidism presumption?
Service in the Republic of Vietnam between January 9, 1962, and May 7, 1975, or other qualifying herbicide exposure locations. No minimum service duration required. Service era: Vietnam Era (August 5, 1964 – May 7, 1975); Korean DMZ; Thailand. Service location: Republic of Vietnam, Thailand (specified bases), Korean DMZ, Johnston Island.
What evidence is still needed for a Hypothyroidism claim?
Service records confirming qualifying herbicide exposure location; thyroid function tests documenting elevated TSH and/or low free T4; endocrinology or primary care records; medication records (levothyroxine therapy); symptoms diary if available; anti-thyroid antibody testing (anti-TPO, anti-thyroglobulin) to distinguish Hashimoto thyroiditis from TCDD-induced hypothyroidism (either may qualify). A presumption removes the requirement to prove a medical link to service. A current diagnosis and qualifying service are still required, and VA decides the claim.
Is there a filing deadline for Hypothyroidism?
No statutory deadline for Agent Orange presumptives
VeteranHQ publishes VA rules and the citations behind them. It does not prepare, file, or represent claims, and nothing here is legal advice or a prediction of what VA will decide.