This page lists UMLS Metathesaurus data elements and traces them back to the specific source data that populates them.
VSAB: ICNP_2022
The submitted file format has changed slightly, and the "ICNP preferred term" string is not necessarily the same as the SNOMEDCT_US PT string. All ICNP PTs are in the same CUI with the SNOMEDCT_US PT with the same code.