Continue to harmonize/share value sets used in US Core and C-CDA in the US Core 8.0 ballot and C-CDA 4.0 ballot
US Core: https://hl7.org/fhir/us/core/terminology.html
C-CDA: https://hl7.org/cda/us/ccda/terminology.html
Shared value sets may mean that both standards point to a shared VSAC set or it may mean that C-CDA points to a US Core set
Harmonized Notes:
Harmonized in 6.1 and/or 7.0:

Smoking status both at observation.code and observation.value
Medication Adherence
Vital Sign Result Type
USPS Two Letter Codes
Procedure Codes
Condition Codes
Gender Identity
Sexual Orientation
Sex
Birth Sex

Candidates for 8.0 and 4.0

Discharge Disposition
US Core Laboratory Test Codes
US Core Non Laboratory Codes (Radiology)
Pregnancy Status Codes
Pregnancy Intent
Goal (SDOH are shared already)
Survey (SDOH are shared already)
DocumentReference
Encounter Type
Simple Observation (C-CDA doesn't have the concept/template of "Simple Observation")

Possible Candidates depending on what happens with the implmentation of the new CDC R&E code system

Detailed ethnicity
Detailed Race
OMB Ethnicity Categories
OMB Race Categories