Patient presents with a neck mass, prompting evaluation for differential diagnoses including lymphadenopathy, benign tumor, cyst, abscess, and malignancy.  Onset, duration, location, and characteristics of the neck mass were documented.  Physical examination included palpation assessing size, consistency, mobility, tenderness, and surrounding skin changes.  Relevant history including recent infection, unintentional weight loss, dysphagia, hoarseness, and family history of thyroid or head and neck cancer was reviewed.  Initial diagnostic workup may include complete blood count (CBC), inflammatory markers, thyroid function tests, and imaging studies such as ultrasound, CT scan, or MRI of the neck.  Fine needle aspiration (FNA) biopsy or excisional biopsy may be indicated for definitive diagnosis.  Patient education addressed potential causes, diagnostic procedures, and treatment options.  Follow-up was scheduled to discuss biopsy results and develop a treatment plan based on the pathology report.  Medical coding will be determined based on the final diagnosis and procedures performed, including appropriate ICD-10 and CPT codes for billing purposes.  Differential diagnosis considerations for neck mass include reactive lymphadenopathy, branchial cleft cyst, thyroglossal duct cyst, lipoma, lymphoma, and head and neck squamous cell carcinoma.