Conditions Secondary to PTSD: The Claims Many Veterans Miss

If your PTSD is already service-connected, any condition it causes or worsens can be claimed as a secondary condition — and you don't have to prove it started in service. You only need a medical nexus linking it to your PTSD or the medication you take for it. Each secondary you win raises your combined rating, and some come with extra compensation on top.

How a secondary claim works

A secondary claim rests on three things:

• A service-connected primary — here, your PTSD.
• A current diagnosis of the secondary condition from a doctor.
• A nexus opinion stating the condition is "at least as likely as not" caused or aggravated by your PTSD or its treatment.

Because PTSD is already service-connected, the hardest part of a normal claim — proving the condition ties back to service — is mostly done. You're just connecting the dots between two medical conditions.

"Aggravated by" is the key phrase: even if you already had the condition, any worsening caused by your PTSD is compensable — you don't have to show PTSD started it.

The conditions most commonly secondary to PTSD

• Sleep apnea — PTSD fragments sleep and contributes to weight gain, both linked to apnea. See sleep apnea claims.
• GERD / acid reflux — driven by chronic stress and by common PTSD medications.
• Erectile dysfunction — from PTSD itself and from antidepressants (SSRIs).
• Migraines and tension headaches — frequently tied to PTSD and poor sleep.
• Hypertension — chronic stress response raises blood pressure. See hypertension ratings.
• Depression and anxiety — usually rated together with PTSD under one mental health rating, not separately.
• IBS and other GI conditions — the gut-stress connection is well documented.
• Substance use disorders — when used to cope with symptoms.

The VA also recognizes weight gain as an intermediate step: PTSD limits activity and disrupts sleep, weight climbs, and that weight contributes to sleep apnea or hypertension. A good nexus letter can walk the examiner through that chain.

Depression and anxiety: rated with PTSD, not on top

Because the VA won't rate the same symptoms twice (a rule called pyramiding), depression and anxiety are almost always folded into a single mental health evaluation with your PTSD rather than added separately. That doesn't hurt you — it can push your one mental health rating higher. The mental health rating tiers explain how.

Erectile dysfunction: the 0% rating that still pays

ED is usually rated 0% under Diagnostic Code 7522 (a compensable 20% requires physical deformity). But a 0% ED rating still qualifies you for Special Monthly Compensation SMC-K — a flat monthly payment of roughly $136 a month (2025) added on top of your regular compensation, separate from your combined rating. Check current figures and see how SMC works.

The nexus opinion is what wins or loses a secondary claim. A strong one comes from a doctor who reviews your history, uses the words "at least as likely as not," and explains the medical rationale — ideally citing how PTSD or its medication leads to your condition.

• States "at least as likely as not (50% or greater probability)."
• Explains the mechanism — why PTSD causes or aggravates this condition.
• References your specific records, medications, and timeline.
• Comes from a provider willing to put their reasoning in writing.

See how to get one in Nexus Letters.

Expect a C&P exam

The VA will often schedule a C&P exam for the secondary condition, where the examiner gives their own opinion on whether it's linked to your PTSD. Your outside nexus letter still matters — it gives the rater a second, favorable opinion to weigh. Show up, be specific about your symptoms, and don't minimize a bad day.

How the ratings actually stack

Secondary ratings don't simply add. The VA uses "whole person" math: if your PTSD is 70% and you add a 50% sleep apnea rating, the combined figure lands around 85% (rounded to 90%), not 120%. That still moves you up a bracket and can be the jump that reaches 100%.

See exactly how yours would combine in the combined rating calculator, or read how VA math works.

How to file a secondary claim

• File the new condition on VA.gov and mark it secondary to your service-connected PTSD.
• Attach a nexus letter and a current diagnosis.
• Add treatment records and, where useful, a buddy or lay statement.
• File multiple secondaries at once if you have them — it's more efficient than one at a time.

Don't refile your PTSD — file each new condition as secondary to it. Refiling PTSD itself can trigger an unnecessary re-exam of a rating you already have.

Want to see how a new secondary rating changes your combined percentage? Run the numbers in the combined rating calculator, or take the benefits quiz to find everything you qualify for.