CPT® Code 80368

A laboratory test identified by CPT® Code 80368 is utilized to measure the presence of non-benzodiazepine sedative hypnotics in biological samples such as urine, serum, or plasma. Non-benzodiazepine sedative hypnotics are a class of psychoactive medications that, while providing similar therapeutic effects, side effects, and risks as traditional benzodiazepines, possess a distinct chemical structure. This class includes well-known medications such as eszopiclone (Lunesta), zaleplon (Sonata), zolpidem (Ambien), zolpidem tartrate (Intermezzo sublingual), ramelteon (Rozerem), chloral hydrate (Noctec), and dexmedetomidine hydrochloride (Precedex). The mechanism of action for most of these drugs involves binding to a specific receptor in the brain known as the omega-1 benzodiazepine receptor, which is thought to induce sleep while being less disruptive to the rapid eye movement (REM) sleep cycle compared to benzodiazepines. Notably, eszopiclone enhances gamma-aminobutyric acid (GABA) activity at receptor sites, while ramelteon functions as a melatonin receptor stimulator. These medications are primarily indicated for short-term management of insomnia, with dexmedetomidine being predominantly used in anesthesia settings. The testing process involves obtaining a blood sample through a separately reportable venipuncture or a urine sample via random void or catheterization. The analysis of these samples employs advanced techniques such as high-performance liquid chromatography-tandem mass spectrometry for eszopiclone, zolpidem, and ramelteon, while zaleplon is assessed using high-performance liquid chromatography alone. Additionally, chloral hydrate in serum and plasma is evaluated using gas chromatography, and dexmedetomidine is analyzed through gas chromatography-mass spectrometry.