CPT® Code 82077

Alcohol (ethanol); any specimen except urine and breath, immunoassay (eg, IA, EIA, ELISA, RIA, EMIT, FPIA) and enzymatic methods (eg, alcohol dehydrogenase)

The CPT® Code 82077 refers to the testing of alcohol (ethanol) levels in any specimen type except for urine and breath. Ethanol is classified as a central nervous system depressant, and measuring its levels is crucial for documenting prior consumption or administration of the substance. Unlike the breath test indicated by CPT® Code 82075, which measures exhaled alcohol levels, Code 82077 encompasses a broader range of specimen types, including saliva, blood, and even vitreous humor in forensic cases. The testing process utilizes immunoassay techniques, such as immunoassay (IA), enzyme immunoassay (EIA), enzyme-linked immunosorbent assay (ELISA), radioimmunoassay (RIA), enzyme-multiplied immunoassay technique (EMIT), and fluorescence polarization immunoassay (FPIA), as well as enzymatic methods like alcohol dehydrogenase assays. In these enzymatic assays, ethanol present in the sample is converted to acetaldehyde by the enzyme alcohol dehydrogenase, which plays a key role in the detoxification of alcohol. This conversion results in the formation of reduced nicotinamide adenine dinucleotide (NADH), which can be quantitatively measured using spectrophotometric techniques. This comprehensive approach allows for accurate assessment of alcohol levels in various biological specimens, providing essential information for clinical and forensic evaluations.