Patient presents with a chief complaint of left breast pain (mastodynia, left breast discomfort).  The pain is described as [character of pain: sharp, dull, aching, burning, throbbing, etc.] and located in the [location of pain: upper outer quadrant, lower inner quadrant, nipple area, diffuse, etc.] of the left breast.  Onset of pain was [onset: gradual, sudden] [duration: days, weeks, months] ago.  Patient reports [frequency: constant, intermittent, cyclical] pain with [exacerbating factors: movement, palpation, certain activities, menstrual cycle] and [relieving factors: rest, medication, heat/cold therapy].  The pain is rated as [pain scale: 0-10] in severity.  Review of systems includes [relevant positives and negatives:  nipple discharge, skin changes, lumps, masses, family history of breast cancer, hormonal changes, recent trauma, current medications].  Physical examination reveals [breast exam findings: tenderness to palpation in [location], no palpable masses, no skin changes, no nipple discharge, normal axillary lymph nodes].  Assessment: Left breast pain (mastalgia), likely [differential diagnoses: cyclical mastalgia, non-cyclical mastalgia, musculoskeletal pain, costochondritis, fibrocystic breast changes, etc.].  Plan:  [diagnostic tests if indicated: mammogram, ultrasound, clinical breast exam].  Patient education provided regarding breast self-exam, lifestyle modifications [e.g., supportive bra, pain management techniques], and follow-up care.  Patient will be prescribed [medications if indicated: NSAIDs, topical analgesics].  Follow-up scheduled in [timeframe] to reassess symptoms and discuss further management if needed.  Diagnosis codes: [ICD-10 codes for left breast pain, e.g., N50.1].