Yes, you can win a VA claim for back pain caused by service-connected flat feet (pes planus). The connection is biomechanical: flat feet alter your gait, forcing your hips and lower back to compensate over time, leading to strain and arthritis. Several Board of Veterans' Appeals (BVA) decisions have granted this connection when veterans provided strong medical evidence and a clear nexus linking foot problems to back pain.
The Biomechanical Link: How Flat Feet Cause Back Pain
Flat feet (pes planus) occur when the arches of the feet collapse or fail to develop properly . This can be congenital or acquired due to the physical demands of military service, such as wearing heavy boots, rucking long distances, or standing for extended periods on hard surfaces .
When the arches collapse, the biomechanics of your entire body change. Without proper arch support, your feet roll inward (pronation), which affects your ankles, knees, and hips. To compensate for the instability, your lower back muscles work harder to keep you upright, leading to chronic strain, muscle imbalances, and eventually lumbar arthritis .
How the Compensation Chain Works
- Altered Gait: Flat feet change how you walk. You may limp or shift your weight to avoid foot pain, placing abnormal stress on your knees and back .
- Postural Changes: Over time, you may develop an anterior pelvic tilt or lumbar lordosis to compensate for the instability, leading to chronic low back strain.
- Muscle Imbalance: Constant compensation can cause tight hip flexors, weak glutes, and core muscles, all of which contribute to lower back pain.
- Increased Fall Risk: Gait abnormalities due to flat feet can increase your risk of falls, which can further injure your back.
This chain reaction is well-documented in VA case law. In Evans v. West, the veteran argued that pain in his knees, legs, and lower back was secondary to his service-connected pes planus, claiming that his foot problems caused an altered gait .
VA Rating Criteria for Pes Planus and Secondary Conditions
How the VA Rates Flat Feet
The VA rates flat feet under Diagnostic Code 5276 (38 CFR § 4.71a) :
| Severity | Criteria | Rating |
|---|---|---|
| Mild | Symptoms relieved by built-up shoe or arch support | 0% |
| Moderate | Weight-bearing line over or medial to great toe, inward bowing of the Achilles tendon, pain on manipulation and use (bilateral or unilateral) | 10% |
| Severe | Objective evidence of marked deformity, pain on manipulation and use accentuated, swelling on use, characteristic callosities | 30% (bilateral) / 20% (unilateral) |
| Pronounced | Marked pronation, extreme tenderness, marked inward displacement and severe spasm of the Achilles tendon, not improved by orthopedic shoes | 50% (bilateral) / 30% (unilateral) |
How Secondary Back Pain Is Rated
If you are granted secondary service connection for back pain, the condition is rated separately using the appropriate diagnostic code for spinal conditions. Common back ratings include :
- Lumbar strain: Under Diagnostic Code 5295, rated from 0% to 100% based on range of motion and incapacitating episodes.
- Degenerative arthritis: Under Diagnostic Code 5242, rated based on range of motion of the thoracolumbar spine.
Winning Your Claim: Evidence You Need
1. Current Diagnoses
You need a current diagnosis of both pes planus and a back disorder (e.g., lumbar strain, degenerative arthritis) from a qualified medical professional. In a 2011 BVA case, the Board granted service connection for back arthritis because the veteran had x-rays revealing degenerative disc disease and hypertrophic osteophytes, confirming a current back disability .
2. Nexus: The Medical Opinion
The nexus is the most critical piece of evidence. A medical opinion that your back pain is "at least as likely as not" caused or aggravated by your pes planus is essential.
As a BVA case noted in 1993, a veteran claimed that his back condition was secondary to his service-connected pes planus, and that his back pain was "caused by the veteran limping because of service-connected flat feet" . The Board has repeatedly remanded claims for further development when the examiner failed to address aggravation .
3. Medical Records and Symptoms
Document your symptoms and progression with objective evidence:
- Range of motion measurements: Show the functional impact of back pain.
- Imaging: X-rays or MRI revealing degenerative changes of the spine .
- Gait abnormalities: Documentation of limping, favoring one side, or using a cane.
- Pain logs: Track how foot pain leads to altered walking and subsequent back pain.
4. Lay Statements
Your statement (or one from someone close to you) can describe how you walk differently, how long you've had back pain, and how it limits your daily activities.
Common Pitfalls and How to Avoid Them
Pitfall 1: The examiner fails to address aggravation
This is a common reason for denial. In a 2000 BVA case, the Board remanded the claim because the VA examiner only addressed causation (whether flat feet caused back pain) but did not discuss whether the flat feet aggravated the veteran's back condition . The Board explicitly stated: "There was no discussion as to whether the veteran's service-connected pes planus aggravated or worsened his low back disorder" .
What to do: Ensure your nexus letter explicitly addresses both causation and aggravation. If the C&P examiner only addresses one, you can challenge the adequacy of the examination .
Pitfall 2: The examiner's opinion is too vague
In an October 2008 BVA decision, the Board found the examiner's opinion inadequate because the examiner did not provide a clear rationale for why the veteran's back pain was or was not related to flat feet . A medical opinion must be supported by a reasoning process and medical rationale.
What to do: Work with your doctor to ensure their nexus letter provides a detailed rationale, including anatomical and biomechanical explanations.
Pitfall 3: Insufficient medical evidence of a current back disability
The VA must show that you currently have a diagnosed back disability . Without a diagnosis, a secondary claim will be denied.
What to do: See a doctor and get an official diagnosis of a back condition. X-rays or MRI can confirm degenerative changes.
Realistic Veteran Scenario: A Grant of Secondary Service Connection
In a BVA case (Citation Nr: 1102841), a veteran with service-connected bilateral foot disability sought service connection for back arthritis. The veteran had x-rays revealing advanced degenerative disc disease of the lower lumbar spine. A VA examiner in March 2010 noted that the veteran had not experienced a back injury but had fallen 30 feet during service and "busted down the metatarsals" in his feet .
The examiner's opinion was considered, and the Board found that the veteran's arthritis of the back was "proximately due to the service-connected bilateral foot disability" . The Board granted the claim because the competent evidence of record showed the veteran's back arthritis was aggravated by his service-connected foot disability .
Frequently Asked Questions
Can I get a VA rating for back pain caused by flat feet?
Yes, as a secondary condition to service-connected pes planus. You need a current diagnosis of a back disability, evidence of altered gait or overcompensation, and a medical nexus linking the two.
What is the "aggravation" standard for back pain secondary to flat feet?
Under Allen v. Brown, aggravation means the service-connected disability (flat feet) permanently worsened a pre-existing non-service-connected condition (back pain) beyond its normal progression . You must show the back condition existed before and that flat feet made it worse.
Do I need a nexus letter for a back pain secondary claim?
Yes. A nexus letter from a qualified medical professional is the most critical evidence for proving that your back pain is caused or aggravated by your flat feet.
What if the VA says my back pain is just age-related?
This is a common denial. You can overcome it with a strong nexus opinion explaining how your flat feet caused a permanent aggravation of your back condition above normal age-related degeneration .
What are the qualifying symptoms for a bilateral pes planus rating?
Symptoms include pain on manipulation and use, marked deformity, pronation, swelling on use, and characteristic callosities. Pronounced symptoms (not improved by orthopedic shoes) with marked pronation, extreme tenderness, and severe spasm can qualify for a 50% rating .
Disclaimer: This information is for educational purposes only and is not legal, medical, or financial advice. It is not affiliated with or endorsed by the U.S. Department of Veterans Affairs. VA policies, forms, and rates change always verify current requirements and deadlines on the official VA.gov website. We strongly recommend working with a Veterans Service Organization (VSO) such as the DAV, VFW, or American Legion, or an accredited claims agent or attorney for assistance with your individual claim.
Calculate Your Exact Combined Rating
Use our free VA combined rating calculator to apply the 38 CFR § 4.25 method to your ratings, including the bilateral factor, and see your combined value, official rounded rating, and estimated 2026 monthly pay.
Use the Free CalculatorMedical and legal disclaimer: This guide is for educational purposes only. It is not medical, legal, or financial advice and is not affiliated with the U.S. Department of Veterans Affairs. VA policies, forms, and compensation rates change frequently.
Always verify current information on VA.gov before filing a claim. For personalized guidance, contact a VA-accredited Veterans Service Organization (VSO), claims agent, or attorney.
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