Merge pull request #198 from cqframework/conversion-factors-codesystem

Added CDCMMEClinicalConversionFactors codesystem using CQL

input/pagecontent/cql/CDCMMEClinicalConversionFactors.cql

@@ -0,0 +1,104 @@
+library CDCMMEClinicalConversionFactors version '3.0.0'
+
+using FHIR version '4.0.1'
+
+define CDCMMEClinicalConversionFactorsCodeSystem:
+    CodeSystem {
+        name: string { value: 'CDCMMEClinicalConversionFactors' },
+        supplements: canonical { value: 'http://www.nlm.nih.gov/research/umls/rxnorm' },
+        concept: List<FHIR.CodeSystem.Concept> {
+            FHIR.CodeSystem.Concept {
+                code: code { value: '2670' },
+                display: string { value: 'Codeine' },
+                property: List<FHIR.CodeSystem."Concept"."Property"> {
+                    FHIR.CodeSystem."Concept"."Property" {
+                            code: code { value: 'conversion-factor' },
+                            value: decimal { value: 0.15 }
+                    }
+                }
+            },
+            FHIR.CodeSystem.Concept {
+                code: code { value: '4337' },
+                display: string { value: 'Fentanyl' },
+                property: List<FHIR.CodeSystem."Concept"."Property"> {
+                    FHIR.CodeSystem."Concept"."Property" {
+                            code: code { value: 'dose-form-conversion-factor' },
+                            value: string { value: '316987:7200@0.33333333' }
+                    }
+                }
+            },
+            FHIR.CodeSystem.Concept {
+                code: code { value: '3423' },
+                display: string { value: 'Hydromorphone' },
+                property: List<FHIR.CodeSystem."Concept"."Property"> {
+                    FHIR.CodeSystem."Concept"."Property" {
+                            code: code { value: 'conversion-factor' },
+                            value: decimal { value: 4 }
+                    }
+                }
+            },
+            FHIR.CodeSystem.Concept {
+                code: code { value: '5489' },
+                display: string { value: 'Hydrocodone' },
+                property: List<FHIR.CodeSystem."Concept"."Property"> {
+                    FHIR.CodeSystem."Concept"."Property" {
+                            code: code { value: 'conversion-factor' },
+                            value: decimal { value: 1 }
+                    }
+                }
+            },
+            FHIR.CodeSystem.Concept {
+                code: code { value: '6813' },
+                display: string { value: 'Methadone' },
+                property: List<FHIR.CodeSystem."Concept"."Property"> {
+                    FHIR.CodeSystem."Concept"."Property" {
+                            code: code { value: 'dose-range-conversion-factor' },
+                            value: string { value: '1-20:4' }
+                    },
+                    FHIR.CodeSystem."Concept"."Property" {
+                            code: code { value: 'dose-range-conversion-factor' },
+                            value: string { value: '21-40:8' }
+                    },
+                    FHIR.CodeSystem."Concept"."Property" {
+                            code: code { value: 'dose-range-conversion-factor' },
+                            value: string { value: '41-60:10' }
+                    },
+                    FHIR.CodeSystem."Concept"."Property" {
+                            code: code { value: 'dose-range-conversion-factor' },
+                            value: string { value: '61-*:12' }
+                    }
+                }
+            },
+            FHIR.CodeSystem.Concept {
+                code: code { value: '7052' },
+                display: string { value: 'Morphine' },
+                property: List<FHIR.CodeSystem."Concept"."Property"> {
+                    FHIR.CodeSystem."Concept"."Property" {
+                            code: code { value: 'conversion-factor' },
+                            value: decimal { value: 1 }
+                    }
+                }
+            },
+            FHIR.CodeSystem.Concept {
+                code: code { value: '7804' },
+                display: string { value: 'Oxycodone' },
+                property: List<FHIR.CodeSystem."Concept"."Property"> {
+                    FHIR.CodeSystem."Concept"."Property" {
+                            code: code { value: 'conversion-factor' },
+                            value: decimal { value: 1.5 }
+                    }
+                }
+            },
+            FHIR.CodeSystem.Concept {
+                code: code { value: '7814' },
+                display: string { value: 'Oxymorphone' },
+                property: List<FHIR.CodeSystem."Concept"."Property"> {
+                    FHIR.CodeSystem."Concept"."Property" {
+                            code: code { value: 'conversion-factor' },
+                            value: decimal { value: 3 }
+                    }
+                }
+            }
+        }
+    }
+

input/pagecontent/cql/ConversionFactors.cql

@@ -46,7 +46,7 @@ All conversion factors supplied in these supplements are in 'mg/d'.
 using FHIR version '4.0.1'
 
 include FHIRHelpers version '4.0.1'
-
+include CDCMMEClinicalConversionFactors version '3.0.0' called CDCMMEClinicalConversionFactors
 
 codesystem "Usage Context Type": 'http://terminology.hl7.org/CodeSystem/usage-context-type'
 codesystem "CDC MME Usage Context Codes": 'http://fhir.org/guides/cdc/opioid-mme-r4/CodeSystem/CDCMMEUsageContextCodes'
@@ -122,19 +122,22 @@ define function GetConversionFactor(ingredientCode System.Code, dailyDose System
     end
   )
 
+/*
+The use of the CDCMMEClinicalConversionFactors is a workaround for the fact that we can't retrieve the formally 
+defined CodeSystem resource (https://fhir.org/guides/cdc/opioid-mme-r4/CodeSystem-CDCMMEClinicalConversionFactors.html) 
+from the FHIR server
+*/
 define ConversionFactorSupplement:
-  singleton from (
-    [CodeSystem] C
-      where C.supplements.value = 'http://www.nlm.nih.gov/research/umls/rxnorm'
-      and (
-        C.name.value = ConversionFactorSupplementName
-          or exists (
-            C.useContext UC
-              where UC.code ~ "Task Usage Context"
-                and UC.value ~ "MME Calculation"
-          )
-      )
-  )
+  CDCMMEClinicalConversionFactors."CDCMMEClinicalConversionFactorsCodeSystem" C
+    where C.supplements.value = 'http://www.nlm.nih.gov/research/umls/rxnorm'
+    and (
+      C.name.value = ConversionFactorSupplementName
+        or exists (
+          C.useContext UC
+            where UC.code ~ "Task Usage Context"
+              and UC.value ~ "MME Calculation"
+        )
+    )
 
 /*
 Converts a range value boundary to a Decimal (or null for a wildcard)