Discrepancy Between LOINC Radiology Class vs Playbook

Hello everyone,

I’ve encountered a discrepancy when comparing the LOINC main distribution table and the LOINC RSNA Playbook, and I’m hoping someone can help clarify the differences.

There seems to be around 109 codes from the RAD and PANEL.RAD class from the LOINC table which are not available in the Playbook.

Some examples below (from v2.82):

LOINC_NUM CLASS STATUS LONG_COMMON_NAME
100225-2 RAD ACTIVE Bone density quantitative ultrasound study
101804-3 RAD ACTIVE Bone DXA Calcaneus [T-score] Bone density
101805-0 RAD ACTIVE Bone DXA Calcaneus [Z-score] Bone density

Questions:

Were these intentionally excluded because of curation?

What would be the inclusion/exclusion criteria?

Are there plans to reconcile these differences?

Thank you.