Patient presents with complaints of knee instability, characterized by a feeling of giving way, buckling, or shifting of the knee joint.  Onset of instability is reported as (acute, subacute, chronic) and related to (specific injury, insidious onset, repetitive strain).  Patient describes the instability as (anterior, posterior, medial, lateral, rotary) and reports it occurs with (specific activities, change in direction, weight-bearing, non-weight-bearing).  Physical examination reveals (positive, negative) Lachman test, (positive, negative) anterior drawer test, (positive, negative) posterior drawer test, (positive, negative) pivot shift test, and (positive, negative) McMurray test.  Range of motion is (within normal limits, reduced, increased) with (pain, crepitus, apprehension) noted at (specific degrees of flexion or extension).  Ligamentous laxity is assessed as (mild, moderate, severe) in the (anterior, posterior, medial, lateral) compartments.  Palpation reveals (tenderness, swelling, effusion) along the (joint line, medial joint line, lateral joint line, patellar tendon).  Assessment: Knee instability, likely due to (ligamentous injury, meniscus tear, patellar subluxation, articular cartilage damage).  Differential diagnosis includes (ACL tear, PCL tear, MCL tear, LCL tear, meniscus tear, patellar dislocation).  Plan:  Referral for (MRI, X-ray) to evaluate for structural damage.  Consider (bracing, physical therapy, surgical intervention) depending on imaging results and patient response to conservative management.  Patient education provided regarding activity modification, knee stabilization exercises, and the importance of follow-up care.  ICD-10 code: (appropriate code based on specific diagnosis).