VASRD 5261 · Musculoskeletal System – Knee/Leg
Limitation of Extension of the Leg (Knee) VA Disability Rating
Knee extension limits your ability to fully straighten your leg. This diagnostic code covers a specific, measurable limitation: how far you're able to straighten the knee. Unlike general knee pain, this rating is driven almost entirely by a precise angle measurement, so how and when that measurement is taken can significantly affect the outcome.
VA Rating Tiers
| Rating | Criteria |
|---|---|
| 50% | Leg can’t straighten—very limited mobility. |
| 40% | Straightening knee is painful and incomplete. |
| 30% | Some ability to straighten knee but significant restriction. |
| 20% | Noticeable knee extension limit—affects standing or walking. |
| 10% | Mild restriction in knee straightening—may affect posture. |
| 0% | Barely noticeable inability to straighten leg fully. |
How the VA Evaluates Limitation of Extension of the Leg (Knee)
The rating is set directly by a goniometer reading - a tool that measures joint angle - taken during a VA Compensation & Pension exam or orthopedic assessment. Because range of motion can vary depending on pain, warm-up, and time of day, the VA looks for a measurement that reflects your knee's typical, day-to-day limitation, not a best-case result.
Approval outlook
High – well-documented ROM loss leads to reliable ratings.
Veterans service-connected
~152,700 veterans
Typical rating awarded
~10%
Vetrify editorial estimates informed by VA published claims data (VBA Annual Benefits Report) and the VA rating schedule — not official VA statistics.
Email me this Limitation of Extension of the Leg (Knee) guide
Get the Limitation of Extension of the Leg (Knee) rating criteria, evidence checklist, and strategy tips delivered to your inbox so you can review them anytime.
Best Evidence to Gather
- •A documented goniometric measurement of extension loss - this is the specific evidence the diagnostic code is built around.
- •Physical therapy evaluations that track range of motion over time, showing consistency rather than a single measurement.
- •Knee X-ray or MRI results identifying the underlying cause (arthritis, prior surgery, ligament damage) of the extension loss.
Strategy Tips
- •Make sure the range-of-motion exam happens without warming up beforehand - testing a knee 'cold' (as it typically is during daily activity) gives a more accurate, and often more favorable, extension measurement than testing after stretching.
- •Document specific functional impacts like difficulty with stairs, squatting, or prolonged standing - this context helps an examiner connect the numeric measurement to real-world limitation.
- •Bring physical therapy records and imaging (X-ray or MRI) alongside the goniometer results, since imaging showing the underlying cause of the limitation supports the objective measurement.
C&P Exam Pitfalls
- •Having range of motion measured after warming up or stretching, which can produce a better result than the knee's typical daily function and lead to an understated rating.
- •Not reporting pain during the extension test itself - pain on motion can support additional consideration beyond the angle measurement alone.
- •A single measurement with no repeat testing for consistency, which examiners may weigh less heavily than a documented pattern.
Common Filing Mistakes
- •Not including a goniometric exam at all - without this specific measurement, the VA has no objective basis to rate under this diagnostic code.
- •Describing only pain without quantifying the actual functional limitation in degrees, since the rating schedule for this code is angle-based, not symptom-based.
- •Leaving out medical history or imaging that explains why the extension loss exists in the first place.
Onset Patterns
- •Limited knee extension frequently follows surgery, an injury, or arthritis that has progressed enough to physically block the joint from fully straightening.
- •It often develops gradually, with the extension deficit slowly worsening as the underlying joint damage progresses, which is why periodic re-measurement can matter for tracking a worsening claim.
Secondary Conditions
Conditions commonly linked to Limitation of Extension of the Leg (Knee). Service-connecting a secondary condition can increase your combined rating.
Common questions about Limitation of Extension of the Leg (Knee)
- Is Limitation of Extension of the Leg (Knee) a VA-rated disability?
- Yes. The VA rates Limitation of Extension of the Leg (Knee) under VASRD diagnostic code 5261 (Musculoskeletal System – Knee/Leg). Knee extension limits your ability to fully straighten your leg. This diagnostic code covers a specific, measurable limitation: how far you're able to straighten the knee. Unlike general kn…
- What VA disability rating can I get for Limitation of Extension of the Leg (Knee)?
- Possible VA ratings for Limitation of Extension of the Leg (Knee) are 50%, 40%, 30%, 20%, 10%, 0%. Examples: 50%: Leg can’t straighten—very limited mobility.; 40%: Straightening knee is painful and incomplete.; 30%: Some ability to straighten knee but significant restriction..
- What's the typical VA rating awarded for Limitation of Extension of the Leg (Knee)?
- Vetrify estimates the typical rating awarded for Limitation of Extension of the Leg (Knee) at around 10%, based on VA claims data and the rating schedule. An estimated 152,700 veterans are service-connected for Limitation of Extension of the Leg (Knee). Estimated approval outlook: High – well-documented ROM loss leads…
- What evidence helps prove Limitation of Extension of the Leg (Knee) for VA disability?
- Strong evidence for a Limitation of Extension of the Leg (Knee) claim includes: A documented goniometric measurement of extension loss - this is the specific evidence the diagnostic code is built around.; Physical therapy evaluations that track range of motion over time, showing consistency rather than a single measur…
- What mistakes should veterans avoid when claiming Limitation of Extension of the Leg (Knee)?
- Common pitfalls when filing for Limitation of Extension of the Leg (Knee): Not including a goniometric exam at all - without this specific measurement, the VA has no objective basis to rate under this diagnostic code.; Describing only pain without quantifying the actual functional limitation in degrees, since the rati…
- What conditions are commonly secondary to Limitation of Extension of the Leg (Knee)?
- Conditions often service-connected as secondary to Limitation of Extension of the Leg (Knee) include: Lower Back Pain, Gait Instability. Filing for secondary conditions can increase a veteran's combined VA rating.
Official sources
- 38 CFR § 4.71a — Schedule of ratings — musculoskeletal system (Diagnostic Code 5261)
Rating criteria on this page are an educational summary of the cited regulation — the eCFR text is authoritative. See how Vetrify derives its numbers.
Estimate your combined rating
See how Limitation of Extension of the Leg (Knee) combines with your other service-connected conditions using the official VA combined-ratings formula.
Open the calculator
VA Calc: Disability Pay
Combine your ratings & see monthly pay on your iPhone · Works offline