Yes, you will likely still require a Compensation & Pension (C&P) exam despite the VA diagnosing your sleep apnea, as the diagnosis alone is insufficient for rating purposes. Under 38 CFR 3.303(a), the establishment of service connection requires not only a current diagnosis but also evidence of an in-service event or aggravation and a medical nexus linking the two. The C&P exam, governed by 38 CFR 3.326(a), is the VA's mechanism to obtain the specific information it needs to adjudicate your claim, which includes assessing the severity of your condition and providing an opinion on nexus and etiology. For sleep apnea, the rating is assigned under 38 CFR 4.97, Diagnostic Code 6847, based on the required treatment (e.g., CPAP use), and the C&P examiner must confirm this and evaluate the impact on your occupational functioning, per the criteria in 38 CFR 4.10 and 4.130. Even with a clear diagnosis, the VA frequently orders exams to fill these specific rating and nexus gaps, a principle supported by case law like *Jones v. Shinseki*, which affirms the VA's duty to assist in developing claims fully. Your actionable next steps are to proactively obtain and submit your complete sleep study report and any prescription for a CPAP or other device, and then prepare for the C&P exam by detailing your symptoms and how they affect your work and daily life, as this functional assessment is critical for the rating. **Disclaimer: This information is for educational purposes only and does not constitute legal or medical advice; for guidance on your specific claim, consult an accredited VA attorney or claims agent.**
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