Patient presents with complaints of right knee pain consistent with degenerative joint disease (DJD), also known as osteoarthritis of the knee.  Symptoms include chronic pain, stiffness, and limited range of motion.  Onset of symptoms was gradual and has progressively worsened over the past six months.  Patient reports pain is exacerbated by weight-bearing activities such as walking and standing, and relieved by rest.  Pain is described as aching and localized to the medial aspect of the right knee.  Patient denies any recent trauma or injury to the right knee.  Physical examination reveals crepitus on palpation and mild effusion.  Range of motion is reduced with pain on flexion and extension.  McMurray's test is negative for meniscal tear.  No ligamentous instability noted.  Radiographic imaging of the right knee demonstrates joint space narrowing, osteophyte formation, and subchondral sclerosis, confirming the diagnosis of osteoarthritis.  Assessment: Right knee osteoarthritis (degenerative joint disease).  Plan: Conservative management is recommended initially, including weight loss if indicated, physical therapy for range of motion and strengthening exercises, and over-the-counter pain relievers such as NSAIDs (ibuprofen or naproxen).  Patient education provided regarding activity modification and joint protection strategies.  Follow-up scheduled in four weeks to assess response to treatment.  If symptoms persist or worsen, consider intra-articular corticosteroid injection or referral to orthopedics for further evaluation and management options such as viscosupplementation or surgical intervention.  ICD-10 code: M17.11 Right knee osteoarthritis, primary.