VA Disability Rating After Knee Replacement — What You Get and When

First: Establishing Service Connection for the Knee

Before the surgery rating applies, you need service connection for the underlying knee condition. Veterans most commonly establish knee service connection through:

• Direct service connection — a knee injury, surgery, or documented condition during active service
• Aggravation — a pre-existing knee condition that was permanently worsened by military service
• Secondary service connection — a knee condition caused by another service-connected condition (e.g., altered gait from a back or hip condition wearing down the knee over time)

If your knee condition is already service-connected and you're having a replacement, the surgery will be covered under your existing claim. If you haven't yet established service connection for the knee, file now — before the surgery if possible — to protect your effective date and maximize back pay.

The Surgical Rating: 100% for One Year

Under 38 CFR § 4.30, when a veteran with a service-connected condition undergoes surgery that requires a period of convalescence, the VA assigns a temporary 100% rating. For total knee arthroplasty (TKA — full knee replacement), the convalescence period is established at one year from the date of surgery under the VA's rating schedule.

The 100% temporary rating:

• Applies from the date of surgery
• Lasts for one full year
• Pays at the full 100% compensation rate — approximately $3,831/month for a single veteran in 2026
• Is automatic upon notification of the surgery — you don't need to file a separate claim for the surgical rating if you already have service connection for the knee

After the Year: The Re-Examination

Approximately one year after surgery, the VA will schedule a Compensation and Pension (C&P) re-examination to assess the knee's condition following recovery. This is where many veterans run into problems.

After recovery, the VA rates the knee based on residual symptoms — whatever limitations remain after the surgery and healing are complete. The knee replacement itself doesn't get a permanent rating; the residuals of the replacement do. Common rating criteria applied after knee replacement include:

Range of Motion (Most Common)

The primary rating criterion for knees after replacement is range of motion limitation under Diagnostic Code 5256 (ankylosis) or 5261/5260 (limitation of extension/flexion). The VA measures how far you can bend and straighten the knee:

• Flexion limited to 15°: 30%
• Flexion limited to 30°: 20%
• Flexion limited to 60°: 10%
• Extension limited to 5°: 20%
• Extension limited to 10°: 10%
• Extension limited to 15°: 10%

Painful Motion

Under 38 CFR § 4.59, any painful motion in a joint that would otherwise rate at 0% must be rated at the minimum compensable rating for that joint — typically 10%. Pain on motion is separately considered and can push a rating higher than the pure range-of-motion measurement would suggest.

Instability

If the knee has instability after replacement — ligamentous laxity or mechanical instability — it can be rated under DC 5257 at 10%, 20%, or 30% depending on severity.

The Post-Surgery C&P Exam — How to Prepare

The re-examination after knee replacement is critical. Many veterans walk into it feeling better than before the surgery — which is natural — and then receive a significantly lower rating because the exam only captured their good days. Here's how to prepare:

1. Document your bad days before the exam. Keep a pain and function diary for 4–6 weeks before the exam. Note days when you can't walk distances, climb stairs, stand for long periods, or sleep due to knee pain.
2. Bring documentation of functional limitations. Notes from your physical therapist, orthopedic surgeon, and primary care doctor showing ongoing limitations are important.
3. Don't push through pain during the exam. The examiner measures your range of motion — stop where it actually hurts, not where you think you should be able to go. The rating is based on where pain stops you, not where anatomy allows.
4. Report all secondary symptoms. Knee replacements frequently cause chronic pain, altered gait, and secondary back or hip conditions. These are separately ratable.
5. Ask your surgeon to document expected permanent limitations in a letter before the exam. A surgeon's opinion that "full recovery" still leaves the patient with limited flexion is powerful evidence.

Secondary Conditions After Knee Replacement

Knee replacement often doesn't end the story — it changes the story. Common secondary conditions that develop or worsen after knee replacement include:

• Altered gait and lower back pain — compensating for the replaced knee stresses the lumbar spine and opposite hip
• Contralateral knee degeneration — increased load on the other knee accelerates wear
• Depression and anxiety — chronic pain and functional limitation affect mental health
• Sleep disorders — post-surgical pain disrupts sleep, potentially developing into sleep apnea
• Hip conditions — altered biomechanics from the replacement affect hip alignment

Each of these can be filed as secondary to the service-connected knee condition. A comprehensive review of your medical history with a VA attorney after surgery often identifies 2–4 additional ratable conditions that most veterans never claim.