Patient presents with left arm swelling, a chief complaint prompting evaluation for potential underlying etiologies.  Onset of swelling was noted (duration).  The swelling is characterized as (localizeddiffuse, pittingnon-pitting) and involves (the entire arm, upper arm, lower arm, hand, specific digits).  Associated symptoms include (pain, tenderness, erythema, warmth, numbness, tingling, weakness, limited range of motion, skin changes, fever, chills, trauma history).  Patient denies (any pertinent negatives).  Physical examination reveals (objective findings e.g., palpable lymph nodes, skin discoloration, temperature difference between arms, pulses present and equal bilaterally or diminished radial pulse, capillary refill time, range of motion limitations, sensory deficits).  Differential diagnosis includes lymphedema, cellulitis, deep vein thrombosis (DVT), venous insufficiency, muscle strain, soft tissue injury, infection, allergic reaction, and cardiac or renal dysfunction.  Initial assessment suggests (working diagnosis).  Ordered tests include (e.g., venous Doppler ultrasound of left arm, complete blood count (CBC), basic metabolic panel (BMP), inflammatory markers).  Treatment plan includes (e.g., elevation of affected extremity, compression therapy, warm compresses, pain management with (medication), antibiotics if infection suspected, referral to specialist if indicated).  Patient education provided regarding symptom management, potential complications, and follow-up care.  Patient advised to return for re-evaluation if symptoms worsen or do not improve within ( timeframe).  ICD-10 code (e.g., R22.2 Swelling of limb) is considered pending further diagnostic evaluation.