Between public releases, we publish a "pre-release" view of new codes that were requested by users and processed for development by the LOINC team. That way you can get a heads-up on what's coming. You can view these in-process codes.
One of the best things about LOINC is that it is available for use worldwide at no cost. Anyone can download it, use it, and even re-distribute it if they wish. The details of the license are available at loinc.org/license.
The LOINC license permits both commercial and non-commercial usage, with a few stipulations about attribution and a prohibition against changing or using LOINC content to create another vocabulary standard. We know you wouldn’t want to do that because it would defeat the whole purpose of having a standard in the first place!