Patient presents with complaints of chronic low back pain, consistent with lumbar osteoarthritis.  Symptoms include localized pain in the lower back, stiffness, and reduced range of motion.  The patient reports morning stiffness lasting approximately 30 minutes, and pain exacerbated by activity and prolonged standing.  Pain is described as aching and occasionally radiating to the buttocks and posterior thighs, but no radicular symptoms are reported.  Physical examination reveals tenderness to palpation over the lumbar spine, crepitus with lumbar flexion and extension, and limited lumbar flexibility.  No neurological deficits are noted.  Radiographic imaging of the lumbar spine demonstrates osteophyte formation, joint space narrowing, and subchondral sclerosis, confirming the diagnosis of lumbar osteoarthritis.  Assessment includes lumbar osteoarthritis (degenerative joint disease), low back pain, and restricted mobility.  The differential diagnosis included lumbar spondylosis, spinal stenosis, and herniated disc, which were ruled out based on clinical presentation and imaging findings.  The treatment plan includes conservative management with non-steroidal anti-inflammatory drugs (NSAIDs) for pain relief, physical therapy focusing on core strengthening and flexibility exercises, and patient education on activity modification and weight management.  Follow-up is scheduled in four weeks to assess response to treatment and discuss further management options if necessary, including potential referral to pain management or orthopedics.