http://hl7.org/fhir/us/core/StructureDefinition/us-core-birthsex|8.0.0-ballot
A code classifying the person's sex assigned at birth as specified by the [Office of the National Coordinator for Health IT (ONC)](https://www.healthit.gov/newsroom/about-onc). This extension aligns with the C-CDA Birth Sex Observation (LOINC 76689-9). After version 6.0.0, this extension is no longer a *USCDI Requirement*.
| Name | Flags | Card | Type | Description & Constraints |
|---|---|---|---|---|
Extension | 0..1 | |||
| ?..? | ||||
| 1..1 | http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113762.1.4.1021.24 (required) | |||
| 1..1 | code | http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113762.1.4.1021.24 (required) |