Why Musculoskeletal Conditions Are the Veteran Experience

Musculoskeletal (MSK) conditions, meaning injuries and degeneration affecting bones, joints, muscles, and connective tissue, are the single most common health consequence of military service. If your back, knee, shoulder, or neck has never felt the same since you left the service, you’re not imagining it and you’re not alone.

A 2020 study by Haskell and colleagues published in Military Medicine found that 29% of men and 26% of women veterans presented to the VA with a new musculoskeletal condition after returning from deployment. That number doesn’t level off with time. VA Health Services Research & Development reported that MSK prevalence climbs from roughly 2% of veterans in year one after deployment to nearly 10-12% by year seven, meaning wear-and-tear injuries often get worse, not better, the longer you’re out.

The Army’s own data backs this up at scale. A 2022 Military Medicine study tracking U.S. Army service members over two years found that 34.7% had at least one low back pain encounter. A separate prospective cohort study by Cameron and colleagues, published in the Journal of Orthopaedic & Sports Physical Therapy, found that 53.4% of soldiers (763 of 1,430 participants) sustained at least one musculoskeletal injury during the study window. Kazis and colleagues, using 2013 National Health Interview Survey data, found veterans report activity-limiting back pain, neck pain, and fracture or joint injuries at higher rates than non-veterans, especially at younger ages.

None of this is fringe. It’s the baseline. If VA rated every MSK claim according to what this research shows, denials and underratings would be rare. They aren’t, which is exactly why understanding the rating mechanics matters more for MSK claims than almost any other category.

How VA Rates Musculoskeletal Conditions: The Basics

The Department of Veterans Affairs (VA) rates every disability using the VA Schedule for Rating Disabilities (VASRD), a regulatory system codified in 38 C.F.R. Part 4. Each condition maps to a diagnostic code, and each code has its own criteria: range of motion thresholds for joints, ankylosis (fixed joint) definitions for the spine, or severity tiers for muscle injuries.

One distinction that trips up a lot of claimants: VA separates the “major” (dominant) extremity from the “minor” (non-dominant) extremity when rating arm and shoulder conditions. If you’re right-handed and your right shoulder is injured, it’s rated as the major group, which generally carries a higher percentage than the identical limitation in a minor, non-dominant shoulder.

Muscle injuries get their own classification system under diagnostic codes 5301 through 5323. VA sorts them into four severity tiers based on the type of injury, your documented history and complaints, and objective exam findings.

These aren’t abstract labels. They’re the exact vocabulary a Compensation and Pension (C&P) examiner is trained to use when writing up your exam. If your Disability Benefits Questionnaire (DBQ) doesn’t use language that maps to one of these tiers, or to a specific range-of-motion number, you’re leaving the rater to guess, and raters who guess tend to guess low.

Inside the Rating Formula: Range of Motion and the Spine Example

The clearest way to understand how VA converts a physical limitation into a percentage is to walk through the General Rating Formula for Diseases and Injuries of the Spine. It’s the model VA uses across almost every joint claim: measure the motion, compare it to a threshold, assign the percentage.

Notice something: a 25-degree gap in forward flexion (from 85° down to 60°) is the difference between 10% and a lower/no rating in some readings, and a similar-sized gap separates 20% from 40%. A few degrees measured on an examiner’s goniometer during a bad day, versus a normal day, can shift your compensation by tens of thousands of dollars over a lifetime. That’s why the exam conditions and how the examiner documents pain-limited motion (covered in Section 6) matter as much as the diagnosis itself.

Knees, shoulders, elbows, wrists, and ankles all follow this same underlying logic, measured motion against a threshold, even though the exact degree cutoffs differ by joint. Learn the spine table and you’ve learned how VA thinks about every joint.

What Changed: VA’s 2021 Update to Musculoskeletal Rating Criteria

Effective February 7, 2021, VA revised the musculoskeletal and muscle injuries portion of the VASRD. According to the VA’s own press release announcing the change, the update modernized outdated medical terminology, removed obsolete diagnostic codes, and added codes for conditions that previously had no clean rating pathway.

The part that matters most if you’re still waiting on a decision or considering an appeal: VA established a “more favorable criteria” rule. If your claim was pending on the effective date but gets decided afterward, VA must apply whichever version, the old criteria or the new criteria, produces the better outcome for you. If you filed after the effective date, only the new criteria apply.

Practically, this means veterans with older, unresolved MSK claims sometimes benefit from a rating system that no longer exists for new filers. If your claim has been sitting in the queue since before February 2021, it’s worth confirming which criteria set your rating decision actually applied.

Common Musculoskeletal Conditions and Their Diagnostic Codes

Most MSK claims fall into a handful of recurring categories, each governed by its own section of 38 C.F.R. § 4.71a.

Back and spine conditions (degenerative disc disease, lumbosacral strain, spinal stenosis) are rated under the general spine formula covered above, diagnostic codes 5235 through 5243, or under the Incapacitating Episodes formula if you have documented physician-prescribed bed rest.

Arthritis, whether degenerative (osteoarthritis) or traumatic, is rated under diagnostic code 5003 when x-ray evidence exists but motion loss alone doesn’t meet a compensable threshold. This code can rate multiple affected joints together as a “group,” which matters if you have arthritis in more than one location from the same in-service cause.

Knee conditions split across several codes depending on the specific problem: recurrent subluxation or lateral instability (5257), limitation of flexion (5260), limitation of extension (5261), and dislocated semilunar cartilage/meniscus (5258). Many veterans qualify for more than one knee code simultaneously, since instability and limited motion are rated separately under VA’s anti-pyramiding rules as long as they represent distinct symptoms.

Shoulder conditions are rated primarily under limitation of arm motion (5201) or, for more severe impairment, humerus impairment (5202) and ankylosis of the scapulohumeral joint (5200), with the major/minor distinction discussed earlier applying throughout.

Why Functional Loss Matters as Much as Degrees on a Goniometer

A single measurement taken on a good day at the C&P exam rarely tells the full story of how your body actually functions. VA regulations at 38 C.F.R. §§ 4.40 and 4.45 require examiners and raters to consider functional loss beyond the raw range-of-motion number: pain on motion, weakness, excess fatigability, incoordination, and loss of function during flare-ups.

This is the most underused lever in an MSK claim. If your knee measures 5261 flexion loss on the exam table but locks up and drops you to the floor once a week during flare-ups, that flare-up frequency and severity is supposed to factor into your rating, not just the static measurement taken that day.

The problem is documentation. Examiners are required to ask about flare-ups, but the answer only helps you if it’s specific. “It hurts sometimes” gets discounted. “Three to four flare-ups per week, each lasting 24-48 hours, during which I cannot bend the knee past 15 degrees and require a cane” gives the rater something concrete to apply against the DeLuca functional-loss factors. Keep a symptom log for a few weeks before any exam: date, trigger, duration, and specific tasks you couldn’t do. Bring it with you.

What MSK Ratings Are Worth: Understanding the Dollar Impact

VA disability compensation is paid monthly and scales sharply, not evenly, as your combined rating rises. The jump from 20% to 30% matters more than the ten-point gap suggests, because 30% is the threshold where VA starts paying additional compensation for a spouse, children, or dependent parents. A veteran rated at 20% with a family sees no dependent add-on; the same veteran bumped to 30% picks up meaningfully higher monthly compensation specifically because dependents now count.

VA also doesn’t add multiple ratings together in simple arithmetic. A 20% knee rating plus a 20% back rating doesn’t equal 40%. VA uses a combined ratings table under 38 C.F.R. § 4.25 that applies each additional rating to the “remaining” percentage of whole-person function, which is why veterans with two or three moderate MSK ratings sometimes land at a combined rating that surprises them, in either direction.

If You Think You’re Underrated: Your Next Step

If your MSK rating doesn’t reflect what your body actually does on a bad day, you have real options. Under VA’s current appeals framework, you can file a Supplemental Claim with new evidence, request a Higher-Level Review of the existing record, or appeal directly to the Board of Veterans’ Appeals. Each path has different rules for what evidence you can introduce and how long a decision takes.

Before you file anything, build the record you wish existed at your last exam: a flare-up log with dates and specifics, buddy statements describing what your spouse or squad mate has watched you struggle with, updated imaging if your condition has progressed, and a private DBQ from a provider who understands how to write findings in VA’s language rather than general clinical language.

You don’t have to figure out which diagnostic code fits your knee or spine, or which appeal path makes sense for your evidence, on your own.