apply fhir data segmentation for privacy (ds4p) security labels and consent resources to protect 42 cfr part 2 substance use disorder records

In-depth guide

Steps

1. Use the HL7 FHIR Data Segmentation for Privacy (DS4P) implementation guide's Resource.meta.security element as the mechanism for applying security labels, rather than inventing a custom tagging scheme
2. Use the DS4P sec-label-basis extension to record whether a given label's legal basis is 42 CFR Part 2 (substance use disorder confidentiality) versus a different regime such as 32 CFR Part 2002 (CUI), since the two carry different handling obligations
3. Model patient authorization with the FHIR Consent resource to capture SUD-specific permissions (who may receive Part 2 data, for what purpose, and any redisclosure prohibition) rather than relying on a single blanket organizational consent
4. Apply DS4P's inline/sub-resource labeling support when only part of a document or bundle is Part 2-protected, instead of defaulting to whole-resource-level segmentation when finer granularity is available and needed
5. Confirm current regulatory posture before finalizing design: HHS's 2024 final rule aligned many Part 2 provisions with HIPAA and explicitly states that segmenting or segregating Part 2 records is not itself a compliance requirement, so labeling should be treated as an implementation option rather than a legal mandate