Patient presents with symptoms suggestive of hyperthyroidism, including unintentional weight loss, heat intolerance, increased sweating, palpitations, tremors, anxiety, and insomnia.  Physical examination reveals tachycardia, fine tremor, warm moist skin, and possible thyroid gland enlargement (goiter).  Differential diagnoses include Graves' disease, toxic multinodular goiter, thyroiditis, and exogenous thyroid hormone intake.  Laboratory evaluation will include thyroid stimulating hormone (TSH), free thyroxine (free T4), and free triiodothyronine (free T3) levels.  Thyroid peroxidase antibodies (TPO antibodies) and thyroglobulin antibodies (Tg antibodies) may be ordered to assess for autoimmune thyroid disease.  Thyroid ultrasound and radioactive iodine uptake (RAIU) scan may be considered for further evaluation of thyroid nodules or gland function.  Initial treatment plan may include antithyroid medications such as methimazole or propylthiouracil (PTU) to control thyroid hormone production.  Beta-blockers may be prescribed to manage symptomatic relief of palpitations and tremors.  Radioactive iodine therapy or thyroidectomy are definitive treatment options and will be discussed with the patient.  Patient education regarding the disease process, medication management, potential side effects, and follow-up care is crucial.  ICD-10 code E05.9 (Hyperthyroidism, unspecified) is documented.  Medical billing and coding will reflect evaluation and management (E/M) services, laboratory testing, and imaging studies performed.  Follow-up appointments are scheduled to monitor thyroid function, medication effectiveness, and adjust treatment as needed.