## Union of http://hl7.org/fhir/us/core/ValueSet/us-core-documentreference-type and http://hl7.org/fhir/ValueSet/doc-typecodes

This is the ValueSet that contains all the codes in US Core DocumentReference Type (http://hl7.org/fhir/us/core/ValueSet/us-core-documentreference-type) and FHIR Document Type Codes (http://hl7.org/fhir/ValueSet/doc-typecodes). E.g. what you have to deal with if you get resources containing codes in either of them

### CodeSystem

Generated Narrative: ValueSet d60db3c3-11ab-472e-82d5-f1229df336b1-14

This value set includes codes based on the following rules:

- Include these codes as defined in `http://terminology.hl7.org/CodeSystem/v3-NullFlavor`

  Code | Display | Definition
  UNK | unknown | **Description:**A proper value is applicable, but not known. **Usage Notes**: This means the actual value is not known. If the only thing that is unknown is how to properly express the value in the necessary constraints (value set, datatype, etc.), then the OTH or UNC flavor should be used. No properties should be included for a datatype with this property unless: 1. Those properties themselves directly translate to a semantic of "unknown". (E.g. a local code sent as a translation that conveys 'unknown') 2. Those properties further qualify the nature of what is unknown. (E.g. specifying a use code of "H" and a URL prefix of "tel:" to convey that it is the home phone number that is unknown.)

- Import all the codes that are contained in the intersection of