VA secondary conditions are health problems caused, or made measurably worse, by a disability you’re already service-connected for. Under federal regulation, they get their own service connection, their own rating, and their own monthly payment on top of what you already receive. A knee injury that eventually wrecks your lower back, PTSD that drives up your blood pressure, an NSAID prescription for a service-connected joint that gives you GERD: all of these can be claimed as secondary. Filed well, a secondary claim can raise your combined rating and, because of how VA math rounds, push your monthly compensation into a higher bracket.
What Counts as a Secondary Condition
The rule sits at 38 CFR ยง 3.310: a disability that is proximately due to, or the result of, a service-connected condition qualifies for its own service connection.1eCFR. 38 CFR 3.310 – Disabilities That Are Proximately Due to, or Aggravated by, Service-Connected Disease or Injury If your service-connected knee eventually causes chronic back pain, that back pain is a separate ratable disability.
The same regulation covers aggravation. If a service-connected condition makes a pre-existing, non-service-connected condition worse, you can be compensated for the degree of worsening, but not the whole condition. The VA establishes a baseline severity before the aggravation began and pays for the increase beyond that baseline.1eCFR. 38 CFR 3.310 – Disabilities That Are Proximately Due to, or Aggravated by, Service-Connected Disease or Injury Mild hearing loss you had before service that a service-connected TBI made significantly worse is the classic example: you’d be compensated for the additional severity only.
The Pyramiding Limit
You cannot be rated twice for the same symptoms under two different diagnoses. This is what the VA calls pyramiding, and it’s prohibited.2eCFR. 38 CFR 4.14 – Avoidance of Pyramiding If your service-connected back condition already accounts for pain and limited range of motion, you can’t claim a secondary condition rated on those same symptoms. The secondary has to involve distinct symptoms or a different body system. Nerve pain radiating into your legs from that back injury is a separate symptom set and gets rated under its own diagnostic code.
Common Secondary Conditions
Some pairings show up repeatedly in VA decisions. Recognizing yours can point you toward the type of evidence you’ll need.
One Physical Problem Leading to Another
Compensatory injuries are among the most accepted secondary claims. A service-connected knee changes your gait, and over years that altered gait produces chronic hip or lower back problems. Ankle injuries drive opposite-knee deterioration. Shoulder injuries lead to neck or opposite-shoulder problems. The cause-and-effect is mechanical and intuitive to examiners.
Radiculopathy is another routine one. A service-connected spinal disc compresses a nerve, and the pain, numbness, or tingling down an arm or leg becomes its own ratable condition. The same reasoning supports peripheral neuropathy secondary to service-connected diabetes: the primary condition damages nerves in the extremities, producing distinct symptoms.3Veterans Affairs. Board of Veterans Appeals Decision – Peripheral Neuropathy Secondary to Diabetes Mellitus
Mental Health Leading to Physical Problems
Service-connected PTSD frequently produces secondary physical diagnoses. Sustained stress keeps the body in a fight-or-flight state, which shows up in the cardiovascular and digestive systems. Common secondary claims include hypertension, irritable bowel syndrome, and GERD.
Sleep apnea secondary to PTSD is more contested but increasingly recognized. Board of Veterans’ Appeals decisions have cited peer-reviewed research showing PTSD disrupts sleep architecture and can develop into obstructive sleep apnea over time.4Veterans Affairs. Board of Veterans Appeals Decision – Obstructive Sleep Apnea Secondary to PTSD Expect the VA to scrutinize other risk factors like weight and age, which is why nexus evidence has to be strong.
Physical Problems Leading to Mental Health Conditions
The link runs the other way too. Chronic pain and lost function from a service-connected physical injury can produce depression, anxiety, or an adjustment disorder. The Board has granted adjustment disorder with mixed anxiety and depressed mood as secondary to chronic pain from a service-connected back condition.5Veterans Affairs. Board of Veterans Appeals Decision – Adjustment Disorder Secondary to Chronic Pain If a service-connected injury limits your mobility, disrupts your sleep, or has ended your ability to work, the psychological toll is a legitimate secondary claim.
Side Effects of Prescribed Medication
A category many veterans overlook. Medications prescribed to treat a service-connected condition can create new problems that are themselves service-connectable. Long-term use of NSAIDs like ibuprofen, naproxen, or meloxicam for a service-connected orthopedic injury is a documented risk factor for GERD, gastrointestinal ulcers, and kidney dysfunction. The Board has granted service connection for GERD caused by long-term NSAID use prescribed for service-connected knee disabilities, with VA examiners confirming the medical literature.6Veterans Affairs. Board of Veterans Appeals Decision – GERD Secondary to NSAID Use The same logic reaches weight gain from psychiatric medications, liver problems from long-term pain management, and erectile dysfunction from blood pressure medications prescribed for a service-connected condition.
The Medical Nexus Is the Whole Claim
Every secondary claim depends on a medical nexus opinion: a professional statement explaining how the primary condition caused or worsened the secondary one. Without it, the VA has no basis to link the two, no matter how obvious the connection looks to you.
A qualified provider has to write the opinion using specific language. The legal standard is “at least as likely as not,” meaning a 50 percent or greater probability that the primary condition caused or aggravated the secondary. “Could be related” or “might have contributed” doesn’t meet that threshold. The opinion should walk through the physiological mechanism, reference your treatment records, and address other plausible causes. Weak, conclusory nexus letters are where claims most often collapse.
Using a Private Doctor
You aren’t stuck with the VA’s own opinion. A private physician can write a nexus letter, and doing so is often worth the cost, particularly if the C&P examiner returns an unfavorable opinion. A specialist in the relevant field carries more weight than a general provider. The letter should state the doctor’s qualifications, how long they’ve treated you, what records they reviewed, and the medical reasoning, using the “at least as likely as not” phrasing.
Disability Benefits Questionnaires
The VA publishes Disability Benefits Questionnaires (DBQs) that private doctors can fill out in the exact format VA raters use to assign ratings.7U.S. Department of Veterans Affairs. Public Disability Benefits Questionnaires (DBQs) – Compensation They capture the clinical findings and functional limitations that map directly to the rating criteria. Pairing the relevant DBQ with a nexus letter gives the rater exactly what they need. A handful of DBQs, including the initial PTSD evaluation and TBI forms, are restricted to VA examiners, but most conditions have publicly available versions.
Filing a Secondary Claim
Lock In Your Effective Date
Before you spend weeks gathering evidence, submit an Intent to File through VA.gov, by phone at 800-827-1000, or by mailing VA Form 21-0966. This locks in your potential effective date, which is the start date for any back pay if the claim is approved.8Veterans Affairs. Your Intent to File a VA Claim You then have one year to file the complete claim. Submit an Intent to File on March 1 and finish the claim on August 15, and any approved benefits backdate to March 1. Skip the step and the effective date defaults to whenever the VA receives your finished application.9Veterans Affairs. Disability Compensation Effective Dates
Assemble the Evidence
A complete package has three things: a current diagnosis of the secondary condition, documentation of your existing service-connected rating for the primary condition, and the nexus opinion linking them. Buddy statements from family or fellow veterans who’ve watched your health decline can add context, but they don’t substitute for the medical nexus.
Submit VA Form 21-526EZ
File using VA Form 21-526EZ, the standard disability compensation application.10Veterans Affairs. File for Disability Compensation With VA Form 21-526EZ Identify the new condition and state explicitly that it’s secondary to your service-connected disability. Be specific about which primary condition it flows from; vague descriptions slow raters down and can lead to misunderstanding.
Filing online through VA.gov sets your effective date automatically when you begin the form, which eliminates the need for a separate Intent to File.11Veterans Affairs. How to File a VA Disability Claim A Veterans Service Officer through the VFW, DAV, or American Legion can review your package and file on your behalf at no cost.
The C&P Exam
After filing, the VA will likely schedule a Compensation and Pension (C&P) exam.12Veterans Affairs. VA Claim Exam (C&P Exam) For a secondary claim, the examiner has two jobs: confirm the condition exists and opine on whether it’s connected to the primary disability. Multiple claimed conditions mean multiple exams.
How you present matters. Describe your symptoms on your worst days, not your best. The VA rates conditions at their most severe, so understating symptoms out of stoicism works against you. Be concrete: not “my back hurts,” but that you can’t sit longer than 20 minutes, that you wake three times a night, that you’ve stopped picking up your kids. Bring copies of your medical records and nexus letter, since the examiner may not have your full file on hand. As of February 2026, disability claims took an average of about 77 days to decide.13Veterans Affairs. The VA Claim Process After You File Your Claim
How a Secondary Rating Changes Your Pay
A new secondary rating does not simply stack on top of your existing one. The VA uses a “whole person” method: each additional disability applies to the healthy percentage of the body that remains after the prior ratings.14Veterans Affairs. About Disability Ratings
Take a veteran rated 50 percent for a knee injury. That leaves 50 percent of the whole person unaccounted for. A new 30 percent secondary rating for back pain applies to that remaining 50, not the full 100. Thirty percent of 50 is 15, so the combined value is 65 percent. The VA rounds to the nearest 10, with values ending in 5 through 9 rounding up, so the combined rating becomes 70 percent.14Veterans Affairs. About Disability Ratings
That rounding is where the money is. For 2026, a veteran at 60 percent with no dependents receives $1,435.02 per month; at 70 percent, $1,808.45. That’s over $370 a month for a single rounding threshold.15Veterans Affairs. Current Veterans Disability Compensation Rates Even a 10 percent secondary rating can move you past a threshold. Ratings of 30 percent or higher also unlock additional compensation for dependents, so a secondary that crosses that line can open benefits you weren’t eligible for before.
If Your Claim Is Denied
Denials are common, and the most frequent cause is a weak or missing nexus, either because the C&P examiner concluded the connection was “less likely than not” or because the evidence did not establish a current diagnosis. The reason for denial determines which review path fits.
Supplemental Claim
If you have new evidence, file a Supplemental Claim. A stronger nexus letter from a specialist, updated records showing a current diagnosis, or supporting medical literature all qualify. The VA readjudicates with the new evidence in the file.16eCFR. 38 CFR 3.2501 – Supplemental Claims There’s no absolute deadline, but filing within one year of the decision preserves your original effective date.
Higher-Level Review
If the file already contained enough evidence and you believe the VA made an error interpreting it, request a Higher-Level Review using VA Form 20-0996. A senior reviewer re-examines the existing record. No new evidence is allowed. The request must be filed within one year of the decision date on your denial letter.17Veterans Affairs. Higher-Level Reviews You can request an optional informal conference, a phone call in which you or your representative point out specific errors. If the reviewer finds a duty-to-assist error, meaning the VA failed to help develop evidence it should have, they’ll gather what’s missing before issuing a new decision.
Board of Veterans’ Appeals
If neither path resolves the claim, appeal to the Board of Veterans’ Appeals. It’s slower, but the Board reviews the full record and can overturn regional decisions. Many of the decisions cited above, including the GERD, sleep apnea, and peripheral neuropathy grants, were won at the Board after initial denials.