This guide covers how the VA actually rates thyroid under diagnostic code 7900 / 7903 — the criteria the rater applies, the evidence that carries weight, and the related conditions veterans most often leave unclaimed. It's the same playbook our own case managers work from.
How the VA rates it
Hypothyroidism: 30% for the first six months after diagnosis, then rated on residuals (fatigue, weight, mental sluggishness ride other codes). On daily medication = service-connectable and the residuals are the money.
Honest ceiling: 30% for six months post-diagnosis; residuals rate after.
The evidence that wins
Service connection: Onset near service, or radiation/burn-pit exposure history.
Medical opinion (nexus): Endocrine opinion when onset is years out.
Filing it right the first time
Most denials on thyroid claims trace to the same failures: the evidence never addressed the actual rating criteria, the connection to service was asserted instead of supported, or the C&P exam went sideways because nobody prepared for it. A complete file — records, statements written to the criteria above, and honest exam preparation — is the difference.
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