No. There is no specific FDA recommended format for distributing LOINC codes. FDA acknowledges that LOINC codes may be displayed as simple text in a table format, or in structured formats such as Javascript Object Notation (JSON) or Extensible Markup Language (XML).
However, FDA strongly encourages the use of an FDA-recognized consensus standard as the mechanism to communicate or disseminate the LOINC codes provided by manufacturers or others (for example, the Regenstrief Institute), to laboratories or other end users. The LOINC transmission document for IVDs (LIVD) standard is one communication standard explicitly developed for this purpose by the IVD Industry Connectivity Consortium. Standardized formats can facilitate a laboratory’s ability to adopt new LOINC codes, incorporate updates or changes to existing LOINC codes, and maintain a database of LOINC codes applicable for local use. FDA recommends that manufacturers follow developments in this area as standards for electronically transmitting recommended LOINC codes are modified or expanded, or as new standards emerge, as these may further contribute to greater semantic interoperability within and across laboratories.
