Patient presents with primary complaint of excessive daytime sleepiness (EDS), fulfilling the diagnostic criteria for hypersomnia.  The patient reports persistent sleepiness despite obtaining adequate nocturnal sleep duration, often exceeding seven hours.  Symptoms include difficulty awakening in the morning, prolonged sleep inertia, and daytime sleep attacks or unintended lapses into sleep.  The patient denies any history of cataplexy, sleep paralysis, or hallucinations associated with sleep onset or offset.  Symptoms significantly impact daily functioning, including occupational performance, social interactions, and overall quality of life.  Objective findings include Epworth Sleepiness Scale (ESS) score of [insert score], indicating clinically significant daytime sleepiness.  Differential diagnoses considered include obstructive sleep apnea, restless legs syndrome, circadian rhythm sleep-wake disorders, and other medical conditions potentially contributing to hypersomnia.  Polysomnography and Multiple Sleep Latency Test (MSLT) ordered to objectively assess sleep architecture and confirm the diagnosis, ruling out other sleep disorders.  Initial treatment plan includes behavioral modifications such as regular sleep-wake schedule, optimization of sleep hygiene, and strategic napping.  Pharmacological interventions may be considered following diagnostic testing, with potential options including wake-promoting agents such as modafinil or armodafinil.  Patient education provided regarding the nature of hypersomnia, potential treatment approaches, and importance of follow-up care.  Follow-up scheduled to review test results and adjust treatment plan as needed.  ICD-10 code G47.1 (hypersomnia, not due to a substance or known physiological condition) assigned.