Flat Feet (Pes Planus) Aggravation Claims

Flat feet, or pes planus, is one of the most common foot conditions evaluated at military entrance examinations and one of the most frequently claimed foot disabilities in the VA system. For veterans who had flat feet before service, the question is almost always aggravation: did military service make the condition significantly worse? Understanding how to prove that aggravation is the foundation of a successful claim.

What Pes Planus Is

Pes planus describes a foot with absent or reduced medial longitudinal arch. In normal foot mechanics, the arch acts as a shock-absorbing spring, distributing the force of impact across the foot and protecting the ankle, knee, and hip from excessive stress. When the arch collapses, that shock-absorption function is lost, and the forces are transmitted directly to the rest of the lower extremity.

There are two types:

• Flexible pes planus: The arch is visible when the foot is non-weight-bearing but disappears when standing. This is the most common type and the most commonly affected by military aggravation.
• Rigid pes planus: The arch is absent even without weight-bearing, often associated with coalition (fusion) of tarsal bones. This type is more likely to be pre-existing from childhood.

Symptoms include medial arch pain, heel pain, ankle fatigue, difficulty with prolonged walking or standing, and downstream effects on the knee and hip.

MEPS Records and the Presumption of Sound Condition

Before exploring the aggravation pathway, one important point: if your MEPS records do not document flat feet at entry, the VA must presume you were in sound condition when you enlisted. That presumption is favorable to the veteran. It means the VA cannot claim you had pre-existing pes planus unless it produces clear and unmistakable evidence to the contrary.

For many veterans, the absence of a MEPS notation for flat feet is actually the stronger position. Rather than arguing aggravation (which requires acknowledging a pre-existing condition), the veteran can pursue direct service connection on the theory that no pre-existing condition was documented and the pes planus developed or became disabling during service.

The aggravation pathway is appropriate when there is affirmative evidence of pre-existing pes planus, such as childhood treatment records or a specific MEPS note of flat feet that was waived. If that evidence exists, aggravation is the right theory. If it doesn't, direct service connection may be more straightforward.

The Aggravation Pathway

Most veterans with flat feet had some degree of pes planus before enlistment. The MEPS examination screens for "severe" flat feet as a disqualifying condition, but mild to moderate flexible pes planus is common in enlistees and is typically waved through.

Military service then dramatically increases the mechanical demands on the arch. Consider:

• Daily running in military boots, often on hard surfaces
• Rucking with 50 to 100 pounds, which multiplies arch loading
• Years of prolonged standing on hard surfaces
• Specific occupational demands (parade duty, extended guard posts, physical training)

Flexible pes planus that was mild or asymptomatic before service often progresses to symptomatic, structurally worsened flat feet after a career of this loading. The arch that held up under normal civilian walking collapses progressively under military demands.

This progression beyond natural history constitutes aggravation under 38 CFR 3.306: the condition was pre-existing, but military service worsened it in a way that would not have occurred without service.

Direct Service Connection

Some veterans didn't have flat feet before service. Their arches developed during service, usually in the setting of:

• Posterior tibial tendon dysfunction (the tendon that supports the medial arch weakens or tears)
• Stress fractures or injuries that altered foot mechanics
• Prolonged high-load activity that caused arch collapse in someone who started with normal or borderline arch structure

For these veterans, direct service connection (not aggravation) is the appropriate pathway.

VA Rating for Pes Planus

Flat feet are rated under Diagnostic Code 5276, with ratings varying by severity and whether the condition is unilateral or bilateral:

• 0%: Mild, or symptomatic only on prolonged standing
• 10%: Moderate; marked pronation, tenderness on prolonged standing, correctable with orthotic devices
• 20%: Severe; marked pronation with tenderness on manipulation, not correctable with orthotics
• 30%: Pronounced; marked pronation, severe pain on manipulation, with marked tenderness, swelling, and manifest postural defects (bilateral)
• 50%: Pronounced bilateral (highest rating)

The severity determination at the C&P exam should include assessment of arch height by observation, documentation of tenderness on palpation of the plantar fascia and medial arch, and evaluation of whether orthotics effectively correct symptoms.

Secondary Conditions from Pes Planus

Flat feet don't just hurt. They produce biomechanical consequences throughout the lower extremity:

• Plantar fasciitis: Arch collapse places abnormal tension on the plantar fascia at its calcaneal insertion. See our article on plantar fasciitis VA claims.
• Ankle instability: Overpronation stresses the lateral ankle ligaments in a repetitive valgus direction.
• Knee pain: Foot hyperpronation creates internal tibial rotation that increases medial compartment loading in the knee.
• Hip and back pain: The gait changes from flat feet propagate up the kinetic chain.

If flat feet are service-connected, each of these downstream conditions may be secondary service-connected. That secondary chain can generate significantly more compensation than the flat foot rating alone.

Building the Aggravation Claim

An aggravation claim for pes planus needs:

1. Evidence of pre-existing condition: MEPS records, childhood treatment records, or simply acknowledgment that the condition existed before service (the VA presumes no pre-existing condition if it wasn't noted at MEPS)
2. Evidence of worsening during service: Sick call records for foot pain, profile limitations, orthotic prescription during service, or simply the documented increase in symptoms over the service period
3. Current severity documentation: X-ray showing arch collapse, functional assessment of orthotic dependence, pain documentation
4. Nexus opinion: A medical opinion explaining why the current severity exceeds what would have occurred without military service

The nexus letter is the critical element. It must explain both the mechanism of aggravation (military loading on a pre-existing vulnerable arch) and why the current condition represents service-related worsening beyond natural history.

Flat Rate Nexus provides physician-signed independent medical opinions at flatratenexus.com, along with a free nexus letter grader and C&P exam prep resource. These tools are specifically useful for aggravation claims where the service-connection theory is more complex than a single acute injury.