Remove US Core NDC to CVX Code Mapping and only reference the CDC’s CVX crosswalk table (CDC National Drug Code (NDC) Directory – Vaccine NDC Linker Table)

background: 

per Rob M:

... I’d include textual guidance to help folks find that mapping at most.

1. What is the justification for the US Core IG to contain a value set or mapping table of NDC codes? It can never be complete, even if you focus on vaccines, because even CDC doesn’t do a great job of keeping it up to date. And then someone, has to go get it and update the content here. Is ONC paying to update monthly? Weekly?

guidance from ONC 

The CCDS includes the Immunizations in accordance with at a minimum, the standards specified in § 170.207(e)(3) HL7 Standard Code Set CVX—Vaccines Administered, updates through August 17, 2015 and § 170.207(e)(4) National Drug Code (NDC) Directory– Vaccine NDC Linker, updates through August 17 2015.

USCDI

Immunizations • CDC IIS: Current HL7 Standard Code Set, CVX – Vaccines Administered, updates through January 31, 2020 • CDC National Drug Code (NDC) Directory – Vaccine NDC Linker Table, updates through January 31, 2020