Value set of lab result code system that are not covered in SNOMED at the time of this implementation. Over time the code system was expanded to include any concept that would be represented in SNOMED CT including the following semantic types (e.g. procedure, findings, methods, organisms, qualifier value, etc.). Beginning in 2022 the PLR Code System was assigned a SNOMED extension namespace ID and will be transitioned over to the newly created SNOMED Concept ID.