Peripheral Vascular Disease

Peripheral vascular disease is rated under 38 CFR § 4.104, diagnostic code 7114, and the rating turns on two numbers almost nobody walks into a C&P exam having documented. The first is the ankle/brachial index, the ABI, which is the ratio of blood pressure at the ankle to blood pressure at the arm. The second is the claudication distance: how far you can walk on a level grade at two miles per hour before ischemic leg pain stops you. Get those two measurements into the record and the rating tends to follow the regulation. Leave them out and the rating tends to default low or the case gets sent back.

The structural feature that separates DC 7114 from most cardiovascular codes is that each affected extremity is rated separately. PAD is rarely a one-leg disease. If the left leg rates at 40 percent and the right leg rates at 20 percent, those are two ratings that combine, not one. That alone is where a lot of single-rating decisions leave compensation on the table.

This page walks through the DC 7114 rating tiers and what each one requires, why the ABI and the documented walking distance are the rating engine, the C&P exam mechanics that determine whether the case is decided or remanded, the related code DC 7115 for Buerger's disease, and the secondary chains that matter most, with diabetes mellitus being the dominant pathway under 38 CFR § 3.310.

TL;DR

• Peripheral vascular disease (arteriosclerosis obliterans / peripheral artery disease) is rated under 38 CFR § 4.104, DC 7114. Each affected extremity is rated separately.
• The rating engine is two measurements: the ankle/brachial index (ABI) and the documented claudication distance at two miles per hour on a level grade.
• 100% requires ischemic limb pain at rest, OR deep ischemic ulcers, OR an ABI of 0.4 or less.
• 60% requires claudication on walking less than 25 yards, AND either persistent coldness of the extremity or an ABI of 0.5 or less.
• 40% requires claudication on walking between 25 and 100 yards, AND trophic changes (thin skin, absence of hair, dystrophic nails) or an ABI of 0.6 or less.
• 20% requires claudication on walking more than 100 yards, AND diminished peripheral pulses or an ABI of 0.9 or less.
• PAD secondary to service-connected diabetes mellitus is the dominant secondary pathway. Hypertension and tobacco-related disease also feed the chain.
• DC 7115 covers thromboangiitis obliterans (Buerger's disease) with parallel criteria.
• In Claim Raven's analysis of 682 BVA peripheral vascular disease cases, 14.2% were granted, 26.2% were remanded, and 59.5% were denied. Of the 433 cases with a C&P adequacy determination, 55.7% had the exam flagged as inadequate.

DC 7114 and What Each Tier Pays

The peripheral arterial disease code is built as a ladder, and the rungs are defined by the ABI number paired with a functional finding. Here is what each tier requires under 38 CFR § 4.104:

Ischemic limb pain at rest; or, deep ischemic ulcers; or, ankle/brachial index of 0.4 or less, 100%

Claudication on walking less than 25 yards on a level grade at 2 miles per hour; and, persistent coldness of the extremity, or ankle/brachial index of 0.5 or less, 60%

Claudication on walking between 25 and 100 yards on a level grade at 2 miles per hour, and; trophic changes (thin skin, absence of hair, dystrophic nails) or ankle/brachial index of 0.6 or less, 40%

Claudication on walking more than 100 yards, and; diminished peripheral pulses or ankle/brachial index of 0.9 or less, 20%

A few things about how this ladder actually behaves.

The 100 percent tier is disjunctive. Any one of the three findings carries it: pain at rest, deep ischemic ulcers, or an ABI of 0.4 or less. A veteran does not need all three. An ABI of 0.4 alone, with no rest pain documented, is a 100 percent leg.

The 60, 40, and 20 percent tiers are conjunctive on their face. Each one pairs a claudication-distance finding with a second finding, joined by "and." At 60 percent the second finding is persistent coldness or an ABI of 0.5 or less. At 40 percent it is trophic changes or an ABI of 0.6 or less. At 20 percent it is diminished peripheral pulses or an ABI of 0.9 or less. The ABI cutoffs are written so that a low enough index satisfies the second prong by itself, which is why the index number matters so much: a documented ABI can carry the rating even when the claudication distance was never measured cleanly.

The normal ABI is roughly 1.0 to 1.4. An index at or below 0.9 is generally read as evidence of arterial disease, which is the floor of the 20 percent tier. As the index drops, the tier climbs: 0.6 or less reaches 40, 0.5 or less reaches 60, 0.4 or less reaches 100. The index is the most objective single number in the whole code, which is exactly why a C&P exam that omits it forces the rater to lean on the softer claudication-distance description.

Because each extremity is rated separately, the real-world combined rating for a veteran with bilateral PAD can be substantially higher than any single leg's number. Two legs at 40 percent each do not equal 80 percent. They combine under 38 CFR § 4.25, and because both legs are involved, the bilateral factor under 38 CFR § 4.26 adds 10 percent of the combined value before further combinations. That is a meaningful adjustment that single-leg decisions never reach.

The ABI and the Walking Distance Are the Rating Engine

If there is one thing to take from this page, it is that DC 7114 is decided by two measurements, and both have to be in the file.

The ankle/brachial index is measured with a blood pressure cuff and a Doppler probe, comparing systolic pressure at the ankle to systolic pressure at the arm. It is inexpensive, repeatable, and objective. It is also the cleanest way to satisfy the second prong of the 20, 40, and 60 percent tiers, and it is the only objective way to reach 100 percent short of documented rest pain or ischemic ulcers. An exam without an ABI is missing the single most determinative number in the code.

The claudication distance is the second engine. The regulation does not ask whether you have leg pain. It asks how far you can walk on a level grade at two miles per hour before ischemic pain stops you, and the distance bands are specific: more than 100 yards is 20 percent territory, 25 to 100 yards is 40 percent territory, less than 25 yards is 60 percent territory. That is a quantified, distance-based finding. "Patient reports leg pain with walking" is not a claudication distance. It does not place the veteran in any band.

The reason this matters for outcomes is that the gap between a usable exam and an unusable one is narrow. A treadmill or measured-walk assessment that records the distance to onset of claudication, paired with an ABI reading, gives the rater everything DC 7114 needs. An exam that records neither leaves the rater with a vascular diagnosis and no way to place it on the ladder, and that is precisely the kind of record that gets sent back rather than decided.

C&P Exam Mechanics: What the Examiner Has to Measure

The artery and vein conditions DBQ drives the PAD exam. For DC 7114 specifically, the components that decide the rating are:

• The ankle/brachial index for each affected extremity, measured by Doppler, not estimated.
• A claudication assessment that records the distance walked on a level grade at two miles per hour before ischemic pain onset, ideally by treadmill or measured walk rather than patient recollection alone.
• Peripheral pulse examination for each extremity (dorsalis pedis, posterior tibial), with diminished or absent pulses noted, which is the 20 percent second prong.
• Trophic changes: thin skin, loss of hair on the extremity, dystrophic nails, which is a 40 percent second prong.
• Persistent coldness of the extremity, a 60 percent second prong.
• Ischemic ulcers and rest pain, the findings that reach 100 percent.

When all of these are in the report, the rater can place each leg on the DC 7114 ladder without guessing. When the exam omits the ABI or skips a treadmill/walking assessment, the case loses its objective anchor. That omission is the single most common remand trigger I see in this subset.

The numbers from the dataset bear this out. Of the 433 peripheral vascular disease cases that carried a C&P adequacy determination, 55.7 percent had the examination flagged as inadequate. That is a majority. When more than half of the examined cases have an exam the Board considers inadequate, the proximate cause is almost always a missing measurement: no ABI, no quantified claudication distance, no pulse documentation. The exam is the rating engine, and in this condition the engine is frequently shipped without its two key parts.

DC 7115 and Buerger's Disease

A related code worth knowing is DC 7115, thromboangiitis obliterans, commonly called Buerger's disease. It is an inflammatory occlusive disease of the small and medium arteries and veins, strongly associated with tobacco use, and it presents with claudication, coldness, and ischemic changes much like arteriosclerosis obliterans. DC 7115 uses rating criteria that parallel DC 7114, built around the same logic of claudication distance, ABI, and ischemic findings, with each extremity rated separately.

The practical point is that the distinction between DC 7114 and DC 7115 is a diagnostic one rather than a rating-mechanics one. The same evidence that supports a PAD rating (ABI, claudication distance, pulse and trophic findings) is the evidence that supports a Buerger's rating. If the clinical picture is small-vessel inflammatory disease in a tobacco user, DC 7115 may be the better-fitting code, but the proof lanes are the same.

Secondary Chains: Diabetes Is the Dominant Pathway

Peripheral arterial disease is, more often than not, a downstream condition rather than a standalone one. Under 38 CFR § 3.310, secondary service connection can be granted for a condition caused by a service-connected disability or aggravated by one (Allen v. Brown). For PAD, the chains that carry the most weight in BVA decisions are:

Diabetes mellitus to PAD. This is the dominant pathway. Diabetes accelerates atherosclerosis and is one of the strongest medical risk factors for peripheral artery disease. A veteran service-connected for diabetes, including diabetes connected on an Agent Orange presumptive basis, who later develops claudication and a low ABI has a well-supported secondary theory. The nexus opinion should connect the diabetic vascular pathology to the arterial disease in the legs, not just note that both conditions exist.

Hypertension to PAD. Chronic hypertension contributes to arterial wall damage and atherosclerotic progression. When hypertension is the service-connected anchor, the secondary argument runs through the long-term vascular effects of sustained high pressure. This chain is more fact-sensitive than the diabetes chain because hypertension is one of several contributors rather than the dominant one.

Tobacco-related disease. PAD, and especially Buerger's disease under DC 7115, is tightly linked to tobacco use. Where a service-connected respiratory or cardiovascular condition shares the tobacco-exposure pathway, the vascular disease can fit into the same chain, though direct tobacco-use theories of service connection are constrained by statute for claims based on in-service tobacco use itself.

The standard for any of these nexus opinions is the same. The opinion has to identify the mechanism, address the time course, and rule out the obvious alternative causes. "Veteran has diabetes and also has PAD" is not a nexus. "The veteran's long-standing diabetic microvascular and macrovascular disease accelerated the atherosclerotic occlusion documented in the lower extremities, consistent with the reduced ABI and claudication onset" is the kind of articulated reasoning that carries a secondary claim.

A veteran service-connected for diabetes who then establishes bilateral PAD as a secondary, with each leg rated separately under DC 7114 and the bilateral factor applied, can build a combined rating well beyond what the diabetes rating alone produces.

Common Evidence Gaps in Peripheral Vascular Disease Claims

A few patterns I see across BVA decisions involving peripheral vascular disease.

No ABI in the record. This is the central gap. The single most objective number in DC 7114 is the one most often missing from the exam. Without an ABI, the rater cannot satisfy the second prong of the 20, 40, or 60 percent tiers by index value and cannot reach the 100 percent tier by index at all. The case falls back on the softer claudication description, which is frequently underdocumented too.

Claudication described, not measured. The regulation asks for a walking distance at two miles per hour on a level grade. Many records contain "intermittent claudication" or "leg pain with ambulation" without a distance. That language confirms the diagnosis but places the veteran in no rating band. A treadmill or measured-walk assessment is what converts a symptom into a tier.

Each leg not evaluated separately. DC 7114 rates each affected extremity on its own. When the exam treats PAD as a single bilateral entity and the decision assigns one rating, the second leg's rating, and the bilateral factor that would follow, never enter the calculation.

Trophic and pulse findings omitted. Diminished pulses (the 20 percent prong) and trophic changes such as hair loss, thin skin, and dystrophic nails (the 40 percent prong) are quick to document on exam and easy to skip. When they are absent from the report, a leg that clinically belongs at 20 or 40 percent can be undervalued.

Secondary nexus left implicit. For PAD claimed as secondary to diabetes or hypertension, the file often shows both conditions but no medical opinion explicitly connecting them. The adjudicator is not obligated to infer the link. A nexus opinion that articulates the diabetic-vascular mechanism is what moves a secondary claim from plausible to granted.

I don't know the exact share of peripheral vascular disease claims that carry one or more of these gaps. What I can say from Claim Raven's analysis of 682 BVA peripheral vascular disease cases is that 26.2 percent were remanded and 59.5 percent were denied, with only 14.2 percent granted, and that of the 433 cases with a C&P adequacy determination, 55.7 percent had the examination flagged as inadequate. That pattern is consistent with the evidence-gap dynamics described here: a denial-heavy outcome distribution paired with a majority-inadequate exam rate points to records that lacked the two measurements DC 7114 actually runs on. The cases that succeed at the Board tend to carry a documented ABI and a quantified claudication distance for each affected leg, plus, where relevant, an articulated secondary nexus.

Bottom Line

Peripheral vascular disease ratings under DC 7114 are not really about the diagnosis. They are about two numbers: the ankle/brachial index and the claudication distance at two miles per hour on a level grade. Get both into the record for each affected leg and the rating tends to track the regulation. Leave either out and the case defaults low or gets remanded, which is what the data shows happening in this subset, where a majority of examined cases had the C&P flagged as inadequate and denials ran near 60 percent. Each leg is rated separately, the bilateral factor applies when both are involved, and the dominant route into the condition is a secondary chain from service-connected diabetes. Same vascular disease, different paper trail, different outcome.

Related Conditions

Peripheral vascular disease most often connects to diabetes, which is the dominant secondary anchor, and to hypertension as a contributing vascular cause. It overlaps in clinical picture and rating venue with varicose veins, another lower-extremity vascular condition rated under § 4.104, and with broader heart disease where shared atherosclerotic pathology and tobacco exposure run through the same chain. Veterans pursuing PAD as a secondary should review the secondary conditions tool before assuming a single-leg rating tells the whole story.

Methodology and Limitations

• Data source: Rating criteria quoted from 38 CFR § 4.104, DC 7114 (arteriosclerosis obliterans / peripheral artery disease) and DC 7115 (thromboangiitis obliterans / Buerger's disease). Combined ratings math from § 4.25 and the bilateral factor from § 4.26. Secondary service connection from § 3.310, with secondary aggravation under Allen v. Brown.
• Sample size: Patterns in this post are drawn from Claim Raven's analysis of 101,518 condition records drawn from the analyzed subset of Claim Raven's 501,000+ Board-decision library, including 682 peripheral vascular disease cases. Within that subset, outcomes ran 14.2% granted, 26.2% remanded, and 59.5% denied. Of the 433 cases that carried a C&P adequacy determination, 55.7% had the examination flagged as inadequate. The dataset captures overall outcome rather than a per-extremity or per-tier breakdown.
• Classification approach: Diagnostic code definitions drawn from the regulatory text. Secondary-chain analysis follows § 3.310 and the medical relationship between diabetes, hypertension, tobacco exposure, and arterial disease. Compensation logic uses the VA combined ratings table and the bilateral factor.
• Limitations:
• The ABI cutoffs and claudication-distance bands are quoted from DC 7114, but their application depends on whether the exam actually recorded those measurements. Many records do not.
• Worked descriptions of combined ratings are illustrative; exact combined values depend on the specific ratings and the § 4.25 table.
• The distinction between DC 7114 and DC 7115 is diagnostic. A clinician's characterization of the underlying disease decides which code fits.
• Secondary service connection for PAD depends on a competent, articulated nexus opinion. The existence of a service-connected anchor like diabetes does not by itself establish the link.
• Selection bias: BVA-level patterns reflect cases that appealed. Most peripheral vascular disease claims resolve at the RO level and are not in any BVA dataset.
• These observations reflect patterns from the regulatory text and BVA decisions. They are not predictions of individual outcomes.