Patient presents with neck swelling, prompting evaluation for lymphadenopathy, thyroid goiter, or other potential causes.  Onset, duration, location (anterior, posterior, lateral neck), character (tender, non-tender, fluctuant, firm), and associated symptoms (pain, dysphagia, dyspnea, fever, chills, weight loss, fatigue) were documented.  Physical examination included palpation of cervical lymph nodes, assessment of thyroid gland size and consistency, and evaluation for masses or other abnormalities.  Differential diagnosis considers infectious lymphadenitis, mononucleosis, malignancy (lymphoma, head and neck cancer), thyroid disorders (hypothyroidism, hyperthyroidism, thyroiditis, thyroid nodules), congenital anomalies (thyroglossal duct cyst, branchial cleft cyst), and inflammatory conditions.  Diagnostic workup may include complete blood count (CBC), thyroid function tests (TSH, T3, T4), imaging studies (ultrasound, CT scan, MRI), fine needle aspiration biopsy (FNAB), or excisional biopsy, depending on clinical suspicion.  Treatment plan will be determined based on the underlying cause of the neck swelling and may involve antibiotics for infection, observation for benign conditions, or referral to a specialist (endocrinologist, otolaryngologist, oncologist) for further management.  Patient education regarding potential complications, follow-up care, and symptom management was provided.  ICD-10 codes (e.g., R22.2, E04.9, C73) and CPT codes (e.g., 99213, 76536, 10021) will be assigned based on the specific diagnosis and procedures performed.  Medical necessity for all tests and treatments will be documented.