Patient presents with complaints possibly indicative of a renal cyst.  These complaints may include flank pain, hematuria, or hypertension, although many renal cysts are asymptomatic and discovered incidentally during abdominal imaging for other indications.  Physical examination may be unremarkable or reveal tenderness in the flank or costovertebral angle.  Differential diagnosis includes renal cell carcinoma, renal abscess, and other renal masses.  Diagnostic workup includes abdominal ultrasound, computed tomography (CT) scan with or without contrast, and magnetic resonance imaging (MRI) to characterize the cyst and differentiate it from other renal lesions.  Bosniak classification of the renal cyst was performed based on imaging characteristics to assess complexity and malignancy risk.  Laboratory tests such as urinalysis, complete blood count (CBC), and basic metabolic panel (BMP) may be obtained to assess renal function and rule out infection.  Management of simple renal cysts is typically conservative, involving observation and monitoring.  For complex cysts or those causing symptoms, options include percutaneous aspiration, sclerotherapy, or surgical intervention such as laparoscopic or robotic cyst decortication or excision.  Patient education regarding the nature of renal cysts, potential complications such as infection or rupture, and follow-up recommendations was provided.  ICD-10 code N61.9 (renal cyst unspecified) or more specific codes based on laterality and complexity may be applicable.  CPT codes for diagnostic imaging, aspiration, or surgical procedures will be determined based on the specific intervention performed.  Continued monitoring and follow-up are recommended based on cyst characteristics and patient symptoms.