Calloway is one of the nation´s fastest growing clinical toxicology laboratories. We specialize in proprietary testing protoc ... ols that address critical challenges facing today´s drug treatment and medical professionals. This includes Substance Abuse Screening and Drug Therapy Compliance. Calloway is always at the forefront of technology embracing the latest techniques for the entire testing lifecycle including Insta-Cups, high volume screening, in-house GC/MS and MRO review. We were one of the first clinical labs to provide test results via the internet, integrate a seamless Medical Review Officer (MRO) process, and quantify results for buprenorphine and oxycodone. We work with industry leaders to educate medical and treatment professional in the latest developments in patient care and regulatory compliance. read more