I was able to figure it out, and get it to work..

Class osuwmc.DataLookup.REST.TableLookup Extends osuwmc.DataLookup.REST.Base
{

Parameter Version = "1.0.0";

Parameter HandleCorsRequests = 0;

XData UrlMap [ XMLNamespace = "http://www.intersystems.com/urlmap" ]
{
<Routes> 
    <!-- Server Info -->
    <Route Url="/" Method="GET" Call="GetInfo" />
    <Route Url="/EpicDepartment" Method="GET" Call="GetAllEpicDepartments" />
    <Route Url="/EpicDepartment/:departmentID" Method="GET" Call="GetEpicDepartment"/>
    </Routes>
}

ClassMethod GetInfo() As %Status
{
    SET version = ..#Version
    SET info = {
      "version": (version)
    }
    RETURN ..%ProcessResult($$$OK, info)
}

ClassMethod GetAllEpicDepartments() As %Status
{
    SET tSC = $$$OK
    set %response.ContentType = ..#CONTENTTYPEJSON
    set rset = ##class(osuwmc.Epic.Clarity.DepartmentMaster).ExtentFunc()
    write "["
    if rset.%Next(){
      set department = ##class(osuwmc.Epic.Clarity.DepartmentMaster).%OpenId(rset.ID1)
      do department.%JSONExport()
    }
    while rset.%Next(){
      write ","
      set department = ##class(osuwmc.Epic.Clarity.DepartmentMaster).%OpenId(rset.ID1)
      do department.%JSONExport()
    }
    write "]"
    quit tSC
}

ClassMethod GetEpicDepartment(departmentID As %String) As %Status
{
  #dim tSC as %Status = $$$OK
  #dim e As %Exception.AbstractException
  #dim id as %Integer

  set %response.ContentType = ..#CONTENTTYPEJSON
  &sql(SELECT ID1 INTO :id FROM osuwmc_Epic_Clarity.DepartmentMaster WHERE ID = :departmentID)
  IF SQLCODE<0 {WRITE "SQLCODE error ",SQLCODE," ",%msg  QUIT}
  ELSEIF SQLCODE=100 {WRITE "Query returns no results"  QUIT}
  set department = ##class(osuwmc.Epic.Clarity.DepartmentMaster).%OpenId(id)
  Do department.%JSONExport()
  QUIT tSC
}

ClassMethod SwaggerSpec() As %Status
{
  Set tSC = ##class(%REST.API).GetWebRESTApplication($NAMESPACE, %request.Application, .swagger)
  Do swagger.info.%Remove("x-ISC_Namespace")
  Set swagger.basePath = "/api/mgmnt/v1/TESTCLIN/spec/TableLookup"
  Set swagger.info.title = "REST API to Access and Query OSUWMC Cache Tables"
  Set swagger.info.version = "0.1"
  Set swagger.host = "intengtest"
  Return ..%ProcessResult($$$OK, swagger)
}

}

That helped. I was able to get my first two Method's called; however, I am struggling now with passing a value into the message.

<Routes> 
    <!-- Server Info -->
    <Route Url="/" Method="GET" Call="GetInfo" />
    <Route Url="/GetAllEpicDepartments" Method="GET" Call="GetAllEpicDepartments" />
    <Route Url="/GetEpicDepartment" Method="GET" Call="GetEpicDepartment" />
</Routes>

ClassMethod GetEpicDepartment(ID As %String) As %Status
{
    SET tSC = $$$OK
    set sql = "SELECT ID as DepartmentID, Abbr, Name, ExternalName, PhoneNumber, ApptPhone, FaxNumber, Address1, Address2, City, Zip, Specialty, RevLocID, RevLocName, BuildingCategoryID, BuildingName, DepCategoryTypeID, DepType, Center, EAFParent, CostCenter FROM osuwmc_Epic_Clarity.DepartmentMaster WHERE ID = ?"
    do ##class(%ZEN.Auxiliary.jsonSQLProvider).%WriteJSONFromSQL(,,sql,ID)
    return tSC
}

When I try to pass... https://intengtest/api/mgmnt/v1/TESTCLIN/spec/TableLookup/GetEpicDepartment/{ID} into postman I get the following...

{
    "errors": [
        {
            "code": 5002,
            "domain": "%ObjectErrors",
            "error": "ERROR #5002: ObjectScript error: <REGULAR EXPRESSION>PatternSet+4^%Regex.Matcher.1",
            "id": "ObjectScriptError",
            "params": [
                "&lt;REGULAR EXPRESSION&gt;PatternSet+4^%Regex.Matcher.1"
            ]
        }
    ],
    "summary": "ERROR #5002: ObjectScript error: &lt;REGULAR EXPRESSION&gt;PatternSet+4^%Regex.Matcher.1"
}

I ended up taking the QuickStream response, and creating a dynamic object from the JSON in the quick stream to parse it apart.

Using a variable, I created a bunch of IF Statements to either append to the end of the variable or add value to the variable. Once I went through all the necessary fields, I set target.Request.QueryString = the variable.

This has been resolved. Working with another Hospital System we combined our efforts and came up with Code to take the Encoded HL7 Response, decode, and parse it apart to handle the ACK/NCK.,

Worked with WRC and Product on how we could capture this and send the Data Mapping issues within Provider Directory to a Worklist Task.

I worked with WRC and found out how to create a Template for the ncessary fields.