Does the laboratory send an aliquot or the entire specimen to the other certified laboratory?
Comment: If a certified laboratory suspects the presence of an interfering substance/adulterant that it is unable to identify and decides to send the specimen to another laboratory, it must send the entire specimen to the other certified laboratory. The selection of the other laboratory must be made in coordination with the MRO. When transferring a single specimen bottle/split specimen bottles to another certified laboratory, the single specimen/primary (Bottle A)specimen must be resealed. All specimen bottles and chain of custody forms received from the collection site must accompany the specimen bottle(s) to the other laboratory (i.e., copies 1, 2, and 3 of the CCF and all internal chain of custody documents). The primary laboratory should retain copies of all original documents sent to the second laboratory. When the transfer occurs, the primary laboratory must not report any result to the Medical Review Officer (MRO). Note: The process of transferring specimens to another laborator
