diff --git a/.changelog/11138.txt b/.changelog/11138.txt
new file mode 100644
index 000000000..45b66d827
--- /dev/null
+++ b/.changelog/11138.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+checks: populate interval and timeout when registering services
+```
diff --git a/agent/agent.go b/agent/agent.go
index dd981a459..15b439be0 100644
--- a/agent/agent.go
+++ b/agent/agent.go
@@ -2120,10 +2120,22 @@ func (a *Agent) addServiceInternal(req addServiceInternalRequest) error {
 		if name == "" {
 			name = fmt.Sprintf("Service '%s' check", service.Service)
 		}
+
+		var intervalStr string
+		var timeoutStr string
+		if chkType.Interval != 0 {
+			intervalStr = chkType.Interval.String()
+		}
+		if chkType.Timeout != 0 {
+			timeoutStr = chkType.Interval.String()
+		}
+
 		check := &structs.HealthCheck{
 			Node:           a.config.NodeName,
 			CheckID:        types.CheckID(checkID),
 			Name:           name,
+			Interval:       intervalStr,
+			Timeout:        timeoutStr,
 			Status:         api.HealthCritical,
 			Notes:          chkType.Notes,
 			ServiceID:      service.ID,
diff --git a/agent/agent_test.go b/agent/agent_test.go
index b37564a61..25708ace6 100644
--- a/agent/agent_test.go
+++ b/agent/agent_test.go
@@ -452,6 +452,8 @@ func testAgent_AddService(t *testing.T, extraHCL string) {
 					Node:           "node1",
 					CheckID:        "check1",
 					Name:           "name1",
+					Interval:       "",
+					Timeout:        "", // these are empty because a TTL was provided
 					Status:         "critical",
 					Notes:          "note1",
 					ServiceID:      "svcid1",
@@ -500,6 +502,8 @@ func testAgent_AddService(t *testing.T, extraHCL string) {
 					Node:           "node1",
 					CheckID:        "check1",
 					Name:           "name1",
+					Interval:       "",
+					Timeout:        "", // these are empty bcause a TTL was provided
 					Status:         "critical",
 					Notes:          "note1",
 					ServiceID:      "svcid2",
@@ -512,6 +516,8 @@ func testAgent_AddService(t *testing.T, extraHCL string) {
 					Node:           "node1",
 					CheckID:        "check-noname",
 					Name:           "Service 'svcname2' check",
+					Interval:       "",
+					Timeout:        "", // these are empty because a TTL was provided
 					Status:         "critical",
 					ServiceID:      "svcid2",
 					ServiceName:    "svcname2",
@@ -523,6 +529,8 @@ func testAgent_AddService(t *testing.T, extraHCL string) {
 					Node:           "node1",
 					CheckID:        "service:svcid2:3",
 					Name:           "check-noid",
+					Interval:       "",
+					Timeout:        "", // these are empty becuase a TTL was provided
 					Status:         "critical",
 					ServiceID:      "svcid2",
 					ServiceName:    "svcname2",
@@ -534,6 +542,8 @@ func testAgent_AddService(t *testing.T, extraHCL string) {
 					Node:           "node1",
 					CheckID:        "service:svcid2:4",
 					Name:           "Service 'svcname2' check",
+					Interval:       "",
+					Timeout:        "", // these are empty because a TTL was provided
 					Status:         "critical",
 					ServiceID:      "svcid2",
 					ServiceName:    "svcname2",