River Clinic Sleep Medicine
412 Oak Street, Richmond, VA 23220
License VA-44821
4 March 2026
Department of Veterans Affairs
Re: Medical opinion — Alex J. Rivera, DOB 12 March 1984, last four 0000
PTSD (already in this sample file) and current obstructive sleep apnea
I am Elena Park, M.D., board-certified in pulmonary disease and sleep medicine, licensed in Virginia. I have treated Alex J. Rivera in clinic since 12 June 2024 for documented obstructive sleep apnea. I write this opinion from that treatment relationship and from the records listed below. I am not employed by a claims company and I was not paid to produce a predetermined result.
Records reviewed. Service treatment records, 2003–2007. VA treatment records, 2012–2026. Polysomnography, 18 February 2025, AHI 28.4, confirming moderate OSA. Mental-health notes documenting PTSD and medication, 2016–2026. Weight chart: 198 lb in 2016 to 241 lb by 2024 after quetiapine was added. Spouse statement dated 2 January 2026 (witnessed apneas). Sample rating decision in this teaching file dated 12 May 2018 discussing PTSD.
Theory. This opinion addresses secondary service connection and aggravation under 38 CFR § 3.310: whether current OSA is at least as likely as not caused or aggravated by service-connected PTSD.
Opinion. It is my medical opinion that Alex J. Rivera's obstructive sleep apnea is at least as likely as not (50 percent or greater probability) caused or aggravated by PTSD as documented in this fictional file.
Rationale. Chronic PTSD keeps sympathetic tone high and fragments sleep. That pattern increases upper-airway collapsibility. Quetiapine, started for PTSD in 2017 in this sample chart, is associated with weight gain. Witnessed apneas appear after PTSD symptoms and the weight change, not before. Competing causes were considered and do not, standing alone, explain the timing.
Respectfully submitted,
Elena Park, M.D.
Pulmonary Disease and Sleep Medicine
River Clinic Sleep Medicine · (804) 555-0144