diff --git a/frontend/src/lib/models/resources/explanation-of-benefit-model.ts b/frontend/src/lib/models/resources/explanation-of-benefit-model.ts
index f8c0304b..e9aeb15a 100644
--- a/frontend/src/lib/models/resources/explanation-of-benefit-model.ts
+++ b/frontend/src/lib/models/resources/explanation-of-benefit-model.ts
@@ -5,8 +5,14 @@ import {fhirVersions, ResourceType} from '../constants';
 import {FastenOptions} from '../fasten/fasten-options';
 import * as _ from "lodash";
 import {CodingModel} from '../datatypes/coding-model';
+import * as fhirpath from 'fhirpath';
 
 export class ExplanationOfBenefitModel extends FastenDisplayModel {
+  code: CodableConceptModel | undefined
+  code_text: string | undefined
+  code_id: string | undefined
+  code_system: string | undefined
+
 
   disposition: string | undefined
   created: string | undefined
@@ -96,6 +102,15 @@ export class ExplanationOfBenefitModel extends FastenDisplayModel {
   };
 
   r4DTO(fhirResource){
+    let principalDiagnosis = fhirpath.evaluate(fhirResource, "ExplanationOfBenefit.diagnosis.where(type.coding.code='principal').first().diagnosisCodeableConcept.first()")
+
+    if(principalDiagnosis.length > 0) {
+      this.code = principalDiagnosis[0] as CodableConceptModel
+      this.code_text = principalDiagnosis[0]?.coding?.display
+      this.code_id = principalDiagnosis[0]?.coding?.code
+      this.code_system = principalDiagnosis[0]?.coding?.system
+    }
+
     this.type = _.get(fhirResource, 'type.coding', []);
     this.hasType = Array.isArray(this.type) && this.type.length > 0;
     this.resourceStatus = _.get(fhirResource, 'status');
diff --git a/go.mod b/go.mod
index 35678783..c8a59c5a 100644
--- a/go.mod
+++ b/go.mod
@@ -7,8 +7,8 @@ require (
 	github.com/dave/jennifer v1.6.1
 	github.com/dominikbraun/graph v0.15.0
 	github.com/dop251/goja v0.0.0-20230605162241-28ee0ee714f3
-	github.com/fastenhealth/fasten-sources v0.3.2
-	github.com/fastenhealth/gofhir-models v0.0.5
+	github.com/fastenhealth/fasten-sources v0.3.3
+	github.com/fastenhealth/gofhir-models v0.0.6
 	github.com/gin-gonic/gin v1.9.0
 	github.com/glebarez/sqlite v1.5.0
 	github.com/golang-jwt/jwt/v4 v4.4.2
@@ -111,3 +111,5 @@ require (
 )
 
 //replace github.com/fastenhealth/fasten-sources => ../fasten-sources
+//
+//replace github.com/fastenhealth/gofhir-models => ../gofhir-models
diff --git a/go.sum b/go.sum
index 17273b2f..506e273b 100644
--- a/go.sum
+++ b/go.sum
@@ -197,10 +197,10 @@ github.com/evanphx/json-patch v4.2.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQLi
 github.com/evanphx/json-patch v4.5.0+incompatible h1:ouOWdg56aJriqS0huScTkVXPC5IcNrDCXZ6OoTAWu7M=
 github.com/evanphx/json-patch v4.5.0+incompatible/go.mod h1:50XU6AFN0ol/bzJsmQLiYLvXMP4fmwYFNcr97nuDLSk=
 github.com/evanphx/json-patch/v5 v5.6.0 h1:b91NhWfaz02IuVxO9faSllyAtNXHMPkC5J8sJCLunww=
-github.com/fastenhealth/fasten-sources v0.3.2 h1:AdFayvwu88zO5JmMNhxlZDARZW1q6iBNHl9Ew8BSLHs=
-github.com/fastenhealth/fasten-sources v0.3.2/go.mod h1:KUtpp65GaKlpRvl5i8zWTVZlI1yJaUPkvGVqQVEC21w=
-github.com/fastenhealth/gofhir-models v0.0.5 h1:wU2Dz+/h9MzZCTRgkQzeq5l0EFuMI6C5xgCbKislFpg=
-github.com/fastenhealth/gofhir-models v0.0.5/go.mod h1:xB8ikGxu3bUq2b1JYV+CZpHqBaLXpOizFR0eFBCunis=
+github.com/fastenhealth/fasten-sources v0.3.3 h1:JI8fuXd6Cuq21T4aATLDS26Ubdy3foALFrQ/wa1Ylc8=
+github.com/fastenhealth/fasten-sources v0.3.3/go.mod h1:YxgwR6jSEU+edYqEDkm238n7HlvZdW3i04nIh7gSDaM=
+github.com/fastenhealth/gofhir-models v0.0.6 h1:yJYYaV1eJtHiGEfA1rXLsyOm/9hIi6s2cGoZzGfW1tM=
+github.com/fastenhealth/gofhir-models v0.0.6/go.mod h1:xB8ikGxu3bUq2b1JYV+CZpHqBaLXpOizFR0eFBCunis=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
 github.com/fatih/color v1.9.0/go.mod h1:eQcE1qtQxscV5RaZvpXrrb8Drkc3/DdQ+uUYCNjL+zU=
 github.com/fatih/color v1.13.0 h1:8LOYc1KYPPmyKMuN8QV2DNRWNbLo6LZ0iLs8+mlH53w=