Secondary Condition Claim · VASRD 6354
Chronic Fatigue Syndrome (CFS) Secondary to Thyroiditis
A condition caused or aggravated by an already service-connected disability can be granted its own service connection as a secondary condition under 38 CFR § 3.310. Here's how that works for Chronic Fatigue Syndrome (CFS) when it develops after Thyroiditis.
Why Chronic Fatigue Syndrome (CFS) Is Linked to Thyroiditis
Underactive thyroid
Primary condition · VASRD 7916
Thyroiditis
Thyroiditis is inflammation of the thyroid gland, which can cause hormone imbalances leading to fatigue, weight changes, and mood disturbances, distinct from hyperthyroidism (an overactive thyroid), since thyroiditis is specifically about inflammation and can involve either excess or deficient hormone production depending on the stage. The rating depends on how much these symptoms affect daily activity, not the inflammation itself.
Secondary condition · VASRD 6354
Chronic Fatigue Syndrome (CFS)
CFS causes persistent fatigue not improved by rest and worsened by physical or mental activity.
Chronic Fatigue Syndrome (CFS) VA Rating Tiers
The VA rates Chronic Fatigue Syndrome (CFS) the same way whether it's claimed directly or as secondary to Thyroiditis — severity of Chronic Fatigue Syndrome (CFS) itself determines the percentage.
| Rating | Criteria |
|---|---|
| 100% | You can’t perform any regular activity due to extreme fatigue. |
| 60% | You're only able to function about half the time due to fatigue. |
| 40% | Significant exhaustion that limits what you can do most days. |
| 20% | Chronic tiredness that limits your lifestyle and function. |
| 10% | Occasional fatigue that interferes with daily tasks. |
Example combined rating
10% Thyroiditis + 40% Chronic Fatigue Syndrome (CFS) = 46%
The VA combines ratings with Table I of 38 CFR 4.25, not simple addition — 10% and 40% combine to 46%, not 50%. These figures are illustrative; your actual rating for each condition depends on your own evaluation.
Evidence for a Chronic Fatigue Syndrome (CFS) Secondary Claim
- •VA physician diagnosis of CFS
- •Labs ruling out other causes
- •Personal logs of fatigue patterns
- •C&P exam documenting activity limits
Common questions about Chronic Fatigue Syndrome (CFS) secondary to Thyroiditis
- Can Chronic Fatigue Syndrome (CFS) be service-connected as secondary to Thyroiditis?
- Yes. Under 38 CFR § 3.310, a condition that is caused or aggravated by an already service-connected disability can be granted secondary service connection. Underactive thyroid You'll need a current Chronic Fatigue Syndrome (CFS) diagnosis and a medical nexus opinion linking it to your service-connected Thyroiditis — t…
- What VA rating can I get for Chronic Fatigue Syndrome (CFS) as a secondary condition?
- Chronic Fatigue Syndrome (CFS) is rated under VASRD diagnostic code 6354 using the same criteria whether it's a direct or secondary claim: possible ratings are 100%, 60%, 40%, 20%, 10%. The rating depends on the severity of Chronic Fatigue Syndrome (CFS) itself, not on the severity of Thyroiditis.
- How does a secondary Chronic Fatigue Syndrome (CFS) claim affect my combined VA rating?
- The VA doesn't add ratings together. Using the official combined-ratings formula (38 CFR 4.25): a 10% rating for Thyroiditis combined with a 40% rating for Chronic Fatigue Syndrome (CFS) (example figures) produces a combined rating of 46%, not 50%. Approving Chronic Fatigue Syndrome (CFS) as secondary still typically…
- What evidence do I need to service-connect Chronic Fatigue Syndrome (CFS) as secondary to Thyroiditis?
- Strong evidence for the underlying Chronic Fatigue Syndrome (CFS) diagnosis includes: VA physician diagnosis of CFS; Labs ruling out other causes; Personal logs of fatigue patterns; C&P exam documenting activity limits. For the secondary link itself, a nexus letter from a treating provider explaining how Thyroiditis c…
Primary condition
Full Thyroiditis guide
Secondary condition
Full Chronic Fatigue Syndrome (CFS) guide
Estimate your combined rating
See how Thyroiditis and Chronic Fatigue Syndrome (CFS) combine with the rest of your service-connected conditions using the official VA combined-ratings formula.
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