Fast Healthcare Interoperability Resources (FHIR) using Rust:
https://github.com/fhir-rust/fhir-rust
Open Electronic Patient Record (openEHR) using Rust:
https://github.com/openehr-rust/openehr-rust
Systematised Nomenclature of Medicine (SNOMED) using Rust:
https://github.com/snomed-rust/snomed-rust
I have work in progress creating stores for PostgreSQL, SQLite, MySQL, MariaDB, MSSQL, Oracle.