Diabetes as a Secondary Condition: VA Ratings, Nexus, and Claims

If you already carry a VA disability rating for diabetes and have developed another medical problem because of it, you can file a separate claim for that complication and receive its own rating on top of the diabetes rating. This is how a VA disability rating for conditions secondary to diabetes works: under 38 CFR 3.310, any disability “proximately due to or the result of” a service-connected condition can itself be service-connected, and each compensable secondary condition is rated under its own diagnostic code and combined with your existing ratings.¹ Because diabetes damages blood vessels, nerves, kidneys, eyes, and other organ systems, a single diabetes rating can support several additional claims.

What Counts as a Secondary Condition

To win a secondary claim, you need three things: a current diagnosis of the complication, an existing service-connected disability (your diabetes), and medical evidence linking the two.

There are two ways to prove the link. The first is direct causation, meaning your diabetes caused the new condition. The second is aggravation, meaning your diabetes made a condition you already had worse than it would have been on its own. The aggravation theory comes out of the Court of Appeals for Veterans Claims decision in Allen v. Brown (1995), and for those claims the VA wants medical evidence showing the baseline severity before the aggravation, the current severity, and how much of the worsening is attributable to diabetes rather than the natural progression of the other disease.²

Federal Circuit case law has also broadened what counts as causation. In Spicer v. McDonough (2023), the court held that service connection is warranted if a nonservice-connected condition would have been less severe “but for” the service-connected disability, and that diabetes need only be a contributing cause, not the sole or primary one.³ That standard matters when several risk factors are in play, as they often are with diabetes.

The Nexus Letter Is Usually the Whole Ball Game

A nexus is a written medical opinion tying the secondary condition to your diabetes. It should come from a physician, nurse practitioner, or other qualified medical professional, and it should reference your specific medical history and treatment records rather than making generic statements about diabetes in the abstract.⁴

Claims fall apart in predictable ways. The VA has denied secondary claims when veterans submitted general medical literature without an individualized opinion, when a VA examiner attributed the new condition to genetics or family history, and when veterans testified that their doctor had told them verbally the two conditions were linked but had nothing in writing. The Board treats a layperson’s account of what a doctor said as insufficient to establish medical nexus.⁵

A private nexus letter that cites current medical research and speaks to your clinical picture is often the difference. And if the evidence for and against the claim ends up in “approximate balance,” the benefit-of-the-doubt rule requires the VA to resolve the tie in your favor.⁴

Conditions the VA Recognizes as Secondary to Diabetes

Compensable complications are rated separately under their own diagnostic codes, not folded into the diabetes rating.⁶ The list below is the terrain most secondary diabetes claims cover.

Peripheral Neuropathy

Nerve damage in the hands, arms, legs, and feet is among the most common diabetes complications. The VA rates neuropathy separately for each affected extremity based on the specific nerve involved and the severity of impairment. Sciatic nerve ratings (lower extremities) run from 10 percent for mild incomplete paralysis to 80 percent for complete paralysis. For the upper extremities, mild incomplete paralysis of all radicular groups is rated at 20 percent, with higher ratings for moderate, severe, and complete involvement.⁷ A veteran with neuropathy in all four extremities could carry four separate neuropathy ratings.

Diabetic Nephropathy (Kidney Disease)

Diabetes is a leading cause of chronic kidney disease. The VA rates renal dysfunction on a scale tied to clinical markers including albumin, blood urea nitrogen, creatinine, edema, and overall kidney function. Ratings run from noncompensable at the mildest levels up to the highest tier for veterans on regular dialysis or so impaired they cannot manage more than sedentary activity.⁸

Diabetic Retinopathy and Other Eye Conditions

Damage to retinal blood vessels can cause vision loss, cataracts, and glaucoma. Diabetic retinopathy is rated under Diagnostic Code 6006, from 10 to 100 percent, based on visual impairment, visual field loss, and the frequency of incapacitating episodes. Cataracts are rated on the resulting visual impairment. If a diabetic eye condition does not produce compensable visual impairment on its own, it stays as a noncompensable complication folded into the diabetes rating.⁹

Hypertension

The Board has granted service connection where a medical professional laid out how diabetes contributes to vascular damage and elevated blood pressure. It has also denied claims where VA examiners attributed hypertension to essential (primary) causes unrelated to diabetes.⁵ An individualized nexus opinion is critical.

Heart Disease

The connection between diabetes and cardiovascular conditions, including coronary artery disease, atherosclerosis, and stroke, is considered fairly well established in medical literature.¹⁰ You still need a physician’s statement or completed Disability Benefits Questionnaire documenting the medical connection. Stroke is rated at 100 percent for the first six months after the event, then rated based on residual effects.

Erectile Dysfunction

Sustained high blood sugar damages nerves and blood vessels and can cause erectile dysfunction. The VA typically rates ED at 0 percent under Diagnostic Code 7522, but even a noncompensable rating establishes service connection and qualifies you for Special Monthly Compensation at the K level (SMC-K) for loss of use of a creative organ, which pays an additional monthly amount on top of your regular compensation.¹¹ These claims often succeed on medical records and personal statements alone.

Depression, Anxiety, and Other Mental Health Conditions

Managing a chronic disease with dietary restrictions, insulin dependence, and activity limitations can trigger depression or anxiety. The VA rates mental health conditions under the General Rating Formula for Mental Disorders in 38 CFR 4.130, from 0 to 100 percent based on the degree of occupational and social impairment.¹² A 30 percent rating corresponds to occasional decreases in work efficiency with depressed mood, anxiety, and chronic sleep impairment. A 50 percent rating reflects reduced reliability and productivity. A 70 percent rating indicates deficiencies in most areas of life. You need a diagnosed mental health condition and a medical opinion linking it to the diabetes or its treatment.

Obstructive Sleep Apnea

Sleep apnea claims are more contested than neuropathy or nephropathy claims. The argument leans on research showing that insulin resistance and glucose intolerance are associated with obstructive sleep apnea, and that obesity, a component of Type II diabetes physiology, worsens sleep apnea and complicates its management. The Board has granted service connection where private physicians provided detailed nexus opinions grounded in the medical literature, particularly under the aggravation theory.¹³ Expect to need a strong nexus letter that cites specific research.

Other Recognized Complications

The VA has also recognized skin infections (bacterial and fungal conditions tied to impaired circulation and immune function), diabetic foot complications including ulcers and amputations, and peripheral artery disease.

How Secondary Ratings Combine With Your Diabetes Rating

The VA does not add percentages. It uses a combined ratings table that reflects the idea that each additional disability affects a smaller portion of your remaining functional capacity. Ratings are ordered from highest to lowest, combined sequentially, and rounded to the nearest 10 percent.¹⁴ A 50 percent rating combined with a 30 percent rating does not produce 80 percent; the table gives 65, rounded to 70.

When a condition affects paired extremities, both legs or both arms, the VA applies a “bilateral factor” that slightly bumps the combined value to reflect the compounding impact. Because diabetes-related neuropathy in all four extremities can generate four separate ratings on top of the diabetes rating itself, the arithmetic can move quickly. If you end up at a combined 100 percent, or you are unable to work because of your combined service-connected disabilities, you may also qualify for Total Disability Based on Individual Unemployability (TDIU).

Filing the Claim

Secondary condition claims use VA Form 21-526EZ, the same form as any other disability compensation claim. You can file online, by mail, in person at a VA regional office, or with help from a Veterans Service Organization or an accredited representative.¹⁵ The form should identify the secondary condition and specify that your service-connected diabetes caused or aggravated it.

Supporting evidence should include medical records documenting the secondary condition, treatment records showing the progression of both the diabetes and the complication, and, where possible, a nexus letter. You have up to one year from the date the VA receives your claim to submit additional evidence.

The C&P Exam

The VA may schedule a Compensation and Pension exam. The examiner evaluates current severity, reviews your medical history, and provides an opinion on whether the condition is connected to your diabetes, using a standardized Disability Benefits Questionnaire for each condition type. You can review the DBQs in advance to see what the examiner will be looking at.¹⁶ Missing the exam without good cause usually means the VA decides on the existing record, which often leads to a denial.

You can also have a private physician complete a DBQ and submit it with your claim. The VA will not reimburse the cost, but a favorable private DBQ often carries real weight, particularly when a VA examiner is unlikely to offer a favorable nexus opinion.

What To Do If the Claim Is Denied

Secondary diabetes claims get denied for a familiar set of reasons: no medical nexus opinion, a VA examiner blaming genetics or aging, or a negative examiner opinion the Board later finds conclusory. You have three review paths.¹⁷

Supplemental Claim (VA Form 20-0995), for when you have new and relevant evidence not part of the original decision, such as a private nexus letter or updated medical records. As of early 2026, the average processing time is about 61 days.¹⁸
Higher-Level Review (VA Form 20-0996), which asks a more senior reviewer to look at the existing record for errors. No new evidence, but you can request an informal conference to point out specific mistakes. File within one year of the decision.¹⁹
Board Appeal, where a Veterans Law Judge reviews the case. This is the longest path and, on some tracks, allows hearings and new evidence.

One thing worth remembering: even a 0 percent rating on a secondary condition has value. It formally establishes service connection, which lets you file for an increased rating if the condition worsens, may improve priority access to VA healthcare, and can serve as the basis for further secondary claims or special monthly compensation later on.

1
eCFR. 38 CFR 3.310 — Disabilities That Are Proximately Due to, or Aggravated by, Service-Connected Disease or Injury
2
Federal Register. Claims Based on Aggravation of a Nonservice-Connected Disability
3
U.S. Department of Veterans Affairs. Board of Veterans’ Appeals Decision, Citation A25013337
4
U.S. Department of Veterans Affairs. Board of Veterans’ Appeals Decision, Citation A24004019
5
U.S. Department of Veterans Affairs. Board of Veterans’ Appeals Decision, Citation 0818500
6
Cornell Law Institute. 38 CFR 4.119 — Schedule of Ratings, Endocrine System
7
U.S. Department of Veterans Affairs. Board of Veterans’ Appeals Decision, Citation 22013341
8
U.S. Department of Veterans Affairs. Board of Veterans’ Appeals Decision, Citation A22022851
9
U.S. Department of Veterans Affairs. Board of Veterans’ Appeals Decision, Citation 0912972
10
Stateside Legal. Secondary Claims — Ischemic Heart Disease
11
U.S. Department of Veterans Affairs. Board of Veterans’ Appeals Decision, Citation 1813022
12
Cornell Law Institute. 38 CFR 4.130 — General Rating Formula for Mental Disorders
13
U.S. Department of Veterans Affairs. Board of Veterans’ Appeals Decision, Citation 1002710
14
U.S. Department of Veterans Affairs. About VA Disability Ratings
15
U.S. Department of Veterans Affairs. How to File a VA Disability Claim
16
U.S. Department of Veterans Affairs. VA Claim Exam
17
U.S. Department of Veterans Affairs. VA Decision Reviews and Appeals
18
U.S. Department of Veterans Affairs. Supplemental Claim
19
U.S. Department of Veterans Affairs. Higher-Level Review