Hip Pain / Hip Bursitis / Hip Arthritis Secondary to Knee Injury (Patellofemoral Syndrome, Meniscus Tear, ACL/PCL)

Yes. Under 38 CFR § 3.310(a), any disability proximately caused or chronically worsened by a service-connected condition is itself service-connected. Hip Pain / Hip Bursitis / Hip Arthritis is a documented secondary pairing for Knee Injury (Patellofemoral Syndrome, Meniscus Tear, ACL/PCL) with strong medical evidence. A nexus letter from a qualified physician linking the two conditions is the most reliable way to establish this connection.

The gold standard is a private nexus opinion stating — to at least a 50% probability ("at least as likely as not") — that the secondary condition was caused or aggravated by the primary service-connected condition. Peer-reviewed medical literature supporting the physiological mechanism strengthens the nexus. Treatment records documenting the onset or worsening of the secondary condition in temporal relation to the primary are supporting evidence.

The VA rates Hip Pain / Hip Bursitis / Hip Arthritis separately under its own 38 CFR Part 4 diagnostic code, then combines it with Knee Injury (Patellofemoral Syndrome, Meniscus Tear, ACL/PCL) and all other service-connected ratings using the combined ratings formula under § 4.25. The formula applies the whole-person concept: a 50% combined existing rating plus a new 30% rating yields 65% (rounded to 70%), not 80%.

38 CFR § 3.310(a) states: "Disability which is proximately due to or the result of a service-connected disease or injury shall be service connected." The aggravation variant under § 3.310(b) applies where the primary condition permanently worsens a pre-existing disability beyond its natural progression. Both standards require a showing of nexus — a medical or scientific link between the primary condition and the secondary.

The medical evidence supporting Hip Pain / Hip Bursitis / Hip Arthritis as secondary to Knee Injury (Patellofemoral Syndrome, Meniscus Tear, ACL/PCL) is rated strong. Chronic knee injury fundamentally alters lower extremity biomechanics and gait pattern. When the knee joint is painful, unstable, or has limited range of motion, compensatory weight-shifting places abnormal and asymmetric loading forces on the ipsilateral hip joint. Specifically, knee flexion contracture or avoidance of knee flexion causes the hip extensors (gluteus maximus) to work at mechanical disadvantage, leading to progressive hip abductor weakness, trochanteric bursitis, acetabular cartilage overload, and premature osteoarthritis of the ipsilateral hip. Gait analysis studies consistently document altered hip kinetics in subjects with knee osteoarthritis, with medial compartment knee disease particularly associated with hip adductor compensation.

The VA will not solicit nexus evidence on your behalf for secondary claims. In practice, a written nexus opinion from a private physician or independent medical examiner is essential — the VA's Compensation & Pension (C&P) examiner is not required to produce a favorable nexus opinion, and the VA has discretion to weigh competing opinions. Submitting a private nexus letter at the time of filing is the most reliable strategy.