diff --git a/cmd/main-migration/migrations/20251205214433.sql b/cmd/main-migration/migrations/20251205214433.sql
new file mode 100644
index 00000000..34343308
--- /dev/null
+++ b/cmd/main-migration/migrations/20251205214433.sql
@@ -0,0 +1,2 @@
+-- Modify "ChemoProtocol" table
+ALTER TABLE "public"."ChemoProtocol" ADD COLUMN "Patient_Id" bigint NULL;
diff --git a/cmd/main-migration/migrations/atlas.sum b/cmd/main-migration/migrations/atlas.sum
index 9e1a235c..176afc27 100644
--- a/cmd/main-migration/migrations/atlas.sum
+++ b/cmd/main-migration/migrations/atlas.sum
@@ -1,4 +1,4 @@
-h1:JgjOL5Bl+2zIlc2E1Lz/LhEJo/IGWouNe79ccswAcq8=
+h1:8SotxMlqYq7PNXcyAsIzO4075hP1c39CA2efE7Jp1kk=
 20250904105930.sql h1:MEM6blCgke9DzWQSTnLzasbPIrcHssNNrJqZpSkEo6k=
 20250904141448.sql h1:J8cmYNk4ZrG9fhfbi2Z1IWz7YkfvhFqTzrLFo58BPY0=
 20250908062237.sql h1:Pu23yEW/aKkwozHoOuROvHS/GK4ngARJGdO7FB7HZuI=
@@ -145,4 +145,5 @@ h1:JgjOL5Bl+2zIlc2E1Lz/LhEJo/IGWouNe79ccswAcq8=
 20251202180207.sql h1:IHmSMIO3ia+YV5GULixbdlV1joaUAWtnjQHPd8+HKiM=
 20251202231005.sql h1:lua0KKoeBptSfs/6ehZE6Azo6YUlNkOJwGFyb1HQWkY=
 20251205073858.sql h1:Ep03jQ9hJAJILDJfKVcmi3Z6fqmTHSq9gKQtwf070PE=
-20251205211957.sql h1:RGkuUdSgt8BtypqGpji9VBBi1r85e2ez1aJILTB7zi0=
+20251205211957.sql h1:zRHcvLY+nfLdUyMcfpgI8vYQcPzJUWbfjkc4cK0QGHU=
+20251205214433.sql h1:cPyzSgAn5VHElC5yHtK2TCKSnBoTI65S0kcoc2GbIxQ=
diff --git a/internal/domain/main-entities/chemo-protocol/entity.go b/internal/domain/main-entities/chemo-protocol/entity.go
index 63639f46..7ffc8afd 100644
--- a/internal/domain/main-entities/chemo-protocol/entity.go
+++ b/internal/domain/main-entities/chemo-protocol/entity.go
@@ -26,4 +26,5 @@ type ChemoProtocol struct {
 	EndDate           *time.Time           `json:"endDate"`
 	Status_Code       erc.DataVerifiedCode `json:"status_code"`
 	ChemoPlans        *[]ecp.ChemoPlan     `json:"chemoPlans,omitempty" gorm:"foreignKey:Protocol_Id;references:Id"`
+	Patient_Id        *uint                `json:"patient_id"`
 }