Patient presents with signs and symptoms consistent with phlebitis, also known as superficial thrombophlebitis.  The patient reports pain, tenderness, and redness along the affected vein.  On examination, palpable cord-like induration is noted, consistent with venous inflammation.  The area of phlebitis is located in the [location, e.g., right lower extremity, left antecubital fossa].  Surrounding skin exhibits erythema and warmth.  No edema, palpable fluctuance, or lymphadenopathy is appreciated.  The patient denies fever, chills, or systemic symptoms.  Differential diagnosis includes cellulitis, deep vein thrombosis (DVT), and superficial vein thrombosis (SVT).  Based on the clinical presentation, the diagnosis of superficial thrombophlebitis is most likely.  Risk factors for phlebitis were assessed, including recent intravenous cannulation, history of varicose veins, trauma, and underlying medical conditions. The patient's current medications were reviewed.  Treatment plan includes warm compresses, elevation of the affected extremity, nonsteroidal anti-inflammatory drugs (NSAIDs) for pain management, and close monitoring for progression of symptoms.  Patient education provided on signs and symptoms of DVT, including unilateral leg swelling, calf pain, and shortness of breath, and instructed to return immediately if these develop.  Follow-up scheduled in [timeframe, e.g., one week] to reassess the affected area and monitor for resolution of symptoms.  ICD-10 code I80.1 (superficial thrombophlebitis) is considered for this encounter.