Patient presents with complaints of left knee instability, characterized by a feeling of giving way, buckling, or shifting.  Onset of instability is reported as (acute, chronic, insidious), related to (specific injury, mechanism of injury, or gradual onset).  Patient reports (frequency and circumstances of instability episodes, e.g., during sports, walking on uneven surfaces).  Associated symptoms include (pain, swelling, clicking, popping, locking, stiffness, limited range of motion).  Physical examination reveals (positive or negative Lachman test, anterior drawer test, posterior drawer test, pivot shift test, McMurray test).  Palpation reveals (tenderness location and character, presence of effusion).  Range of motion is (documented in degrees of flexion and extension) compared to the contralateral knee.  Assessment: Left knee instability, likely due to (suspected ligament injury, meniscus tear, patellar instability, or other differential diagnosis).  Plan includes (conservative management with physical therapy focusing on strengthening and proprioception exercises, bracing, activity modification) or (referral to orthopedics for further evaluation, consideration of imaging studies such as MRI or X-ray, possible surgical intervention).  Patient education provided regarding knee anatomy, injury mechanism, treatment options, and expected prognosis.  Follow-up scheduled in (timeframe) to assess response to treatment and adjust plan as needed.  ICD-10 code (M23.xx, specify appropriate code) and CPT codes (for procedures performed) documented for medical billing and coding purposes. Differential diagnosis includes ligament sprain, meniscus tear, patellar subluxation, osteoarthritis, and other causes of knee pain and instability.  Patient understands the plan and agrees to follow recommendations.