Hi @Patrick_Ryan, good news!
With the latest release (I will add more information to a “What’s new” section soon) we now have those CPT4 concepts. The latest one from yesterday didn’t make it into the release though… It does exist as a code but only “reserved”. The Pfizer pediatric codes are present (91307, 0071A, and 0072A) and currently map to the RxNorm ingredient as RxNorm will provide a proper RXCUI to those vaccines only after actual official approval although an NDC already exists.
We might want to update our COVID19 wiki page to provide some guidance how these codes could or should be applied. The codes that @JimF requested exist of course, too, properly rolling up to the respective RxNorm clinical drug. See for example: 0003A. The fact which dose this particular administration represents is of course lost in the mapping and has to be preserved by other means (options on how that can be done, should go to that guidance page in the wiki).