Patient presents with complaints of right shoulder pain consistent with right rotator cuff tendinitis.  Onset of pain was gradual, reported as approximately three weeks ago, and exacerbated by overhead activities and lifting.  Patient denies any specific injury or trauma.  Pain is described as a dull ache, localized to the lateral aspect of the right shoulder, radiating down the arm to the elbow.  Pain is rated 4 out of 10 at rest and 7 out of 10 with movement.  Physical examination reveals tenderness to palpation over the right rotator cuff insertion, specifically the supraspinatus and infraspinatus tendons.  Positive findings include pain with active range of motion, particularly abduction and external rotation, and positive Neer and Hawkins impingement tests.  Strength testing demonstrates mild weakness in abduction and external rotation compared to the left side.  No crepitus or instability noted.  Differential diagnosis includes rotator cuff tear, impingement syndrome, frozen shoulder, and cervical radiculopathy.  Assessment: Right rotator cuff tendinitis.  Plan: Conservative management is recommended, including rest, ice, and over-the-counter NSAIDs such as ibuprofen.  Patient education provided regarding activity modification and proper body mechanics.  Referral to physical therapy for range of motion exercises, strengthening, and modalities.  Follow-up scheduled in four weeks to assess response to treatment.  If symptoms do not improve, consider further imaging such as MRI and possible corticosteroid injection.  ICD-10 code M75.11, right rotator cuff tendinopathy or tendinitis, is documented for medical billing and coding purposes.