Patient presents with symptoms suggestive of hypothyroidism, including fatigue, weight gain, constipation, and cold intolerance.  Laboratory results reveal an elevated thyroid stimulating hormone (TSH) level, confirming a diagnosis of high TSH, also known as primary hypothyroidism.  Differential diagnosis considered subclinical hypothyroidism, central hypothyroidism, and thyroid hormone resistance.  Physical examination findings may include bradycardia, dry skin, and delayed deep tendon reflexes.  Current medications, family history, and relevant social history were reviewed.  Patient education provided on the role of the thyroid gland, the significance of high TSH levels, and the need for thyroid hormone replacement therapy.  Treatment plan initiated with levothyroxine sodium, with dosage titrated based on follow-up TSH levels and clinical response.  Patient advised on medication adherence, potential side effects, and the importance of regular monitoring.  ICD-10 code E03.9 (Hypothyroidism, unspecified) assigned.  CPT codes for laboratory testing and office visit documented.  Follow-up appointment scheduled to assess treatment efficacy and adjust medication as needed.  Patient understanding of the diagnosis, treatment plan, and potential complications confirmed.  Emphasis placed on shared decision-making and patient-centered care.  The plan includes ongoing monitoring of TSH, free T4, and free T3 levels to optimize thyroid hormone replacement and achieve euthyroid status.