Diagnostic Code 7901 · 38 CFR §4.119
Toxic thyroid enlargement (toxic goiter) is an enlarged thyroid gland that produces excessive thyroid hormones. Unlike simple goiter, the toxic form causes hyperthyroid symptoms: rapid heartbeat, weight loss, tremors, heat intolerance, and anxiety. Veterans may develop this condition from exposure to environmental toxins during service, radiation exposure, or iodine imbalances from deployment environments.
| Rating | Criteria |
|---|---|
| See pathways% | DC 7901 has no native percentage scale. The VA evaluates it through two pathways and uses whichever pays higher: (1) Hyperthyroid symptoms rated under DC 7900 — automatic 30% for six months after diagnosis, then residuals rated under the appropriate body-system code (cardiovascular, eye, muscle weakness, etc.). (2) Any disfigurement from neck enlargement rated separately under DC 7800 (head/face/neck disfigurement). |
Thyroid function tests (TSH, free T4, free T3) documenting the overactive thyroid are essential. Imaging (ultrasound, radioactive iodine uptake scan) showing the enlarged thyroid supports the diagnosis. Treatment records including medication, radioactive iodine treatment, or surgical reports demonstrate the severity. Photographs of neck disfigurement support a separate rating under DC 7800. Service records connecting exposure or onset to military service establish eligibility.
The VA designed the endocrine rating schedule so that toxic thyroid enlargement is evaluated through its component effects. The hyperthyroid symptoms are rated under DC 7900 (hyperthyroidism), and neck disfigurement is rated under DC 7800. This approach lets the VA capture all aspects of the disability rather than fitting it into a single percentage.
Yes. The thyroid is particularly sensitive to radiation. Veterans exposed to ionizing radiation during service (nuclear testing, cleanup operations, certain occupational exposures) have increased risk of thyroid disorders including toxic goiter and thyroid cancer. Radiation-exposed veterans may qualify for presumptive service connection.