Diagnostic Code 7903 · 38 CFR §4.119
Hypothyroidism means your thyroid gland does not produce enough thyroid hormones, which regulate metabolism throughout your body. Symptoms include fatigue, weight gain, cold intolerance, dry skin, hair loss, constipation, depression, brain fog, muscle weakness, and joint pain. Veterans may develop hypothyroidism from radiation exposure during service, exposure to environmental toxins, as a result of thyroid surgery or treatment for another service-connected condition, or from autoimmune thyroiditis (Hashimoto disease) triggered by service-related stress or exposures.
| Rating | Criteria |
|---|---|
| 100% | Hypothyroidism manifesting as myxedema, which includes cold intolerance, muscular weakness, cardiovascular involvement (such as hypotension, bradycardia, and pericardial effusion), and mental disturbance (such as dementia, slowing of thought, and depression). This 100% rating continues for six months beyond the date a physician determines crisis stabilization. After that period, residual effects are rated under the appropriate diagnostic codes for each affected body system. |
| 30% | Hypothyroidism without myxedema. This 30% rating continues for six months after initial diagnosis. After that six-month period, the VA rates residuals of the disease or medical treatment under the most appropriate diagnostic codes for each affected body system (for example, eye conditions, digestive issues, or mental health disorders). |
Lab results showing thyroid hormone levels (TSH, free T4, free T3) are the foundation — both at diagnosis and over time to show the pattern of the condition. Treatment records showing medication dosages and adjustments demonstrate ongoing management needs. If hypothyroidism is secondary to radiation exposure, thyroid surgery, or medications for other service-connected conditions, include a nexus opinion. Service treatment records showing early thyroid complaints or abnormal lab values during service are helpful. Because residual symptoms are rated under their own codes after the initial six-month period, documenting every symptom — fatigue, depression, cognitive changes, cardiovascular effects — is important for separate ratings.
DC 7903 assigns 100% for myxedema or 30% for hypothyroidism without myxedema, each for an initial period (six months after crisis stabilization or initial diagnosis). After that period, the VA does not rate hypothyroidism itself on a percentage scale. Instead, every residual symptom and complication is rated under its own diagnostic code. This means your total disability picture may involve multiple separate ratings for conditions caused by hypothyroidism.
Yes. The thyroid gland is particularly sensitive to ionizing radiation. Veterans exposed to radiation during service (nuclear testing, medical radiation, depleted uranium, or other sources) who develop hypothyroidism may qualify for direct or presumptive service connection depending on the type and amount of exposure.
After the six-month initial rating period, the VA re-evaluates and rates each residual under its own code. For example, depression from hypothyroidism would be rated under mental health codes, cardiovascular effects under heart codes, and eye involvement under eye codes. Filing separate secondary claims for each residual is essential to maintain your overall rating.