diff --git a/api/fetch_ignores.go b/api/fetch_ignores.go
index 35a1cf360..1404854a9 100644
--- a/api/fetch_ignores.go
+++ b/api/fetch_ignores.go
@@ -2,7 +2,6 @@ package api
 
 import (
 	"encoding/json"
-	"os"
 
 	ignoretypes "github.com/bearer/bearer/internal/util/ignore/types"
 )
@@ -20,7 +19,7 @@ type CloudIgnorePayload struct {
 	PullRequestNumber string   `json:"pull_request_number,omitempty"`
 }
 
-func (api *API) FetchIgnores(fullname string, localIgnores []string) (*CloudIgnoreData, error) {
+func (api *API) FetchIgnores(fullname string, pullRequestNumber string, localIgnores []string) (*CloudIgnoreData, error) {
 	endpoint := Endpoints.FetchIgnores
 
 	bytes, err := api.makeRequest(endpoint.Route, endpoint.HttpMethod,
@@ -29,7 +28,7 @@ func (api *API) FetchIgnores(fullname string, localIgnores []string) (*CloudIgno
 			Data: CloudIgnorePayload{
 				Project:           fullname,
 				LocalIgnores:      localIgnores,
-				PullRequestNumber: os.Getenv("PR_NUMBER"),
+				PullRequestNumber: pullRequestNumber,
 			},
 		})
 	if err != nil {
diff --git a/internal/commands/artifact/run.go b/internal/commands/artifact/run.go
index 885add9f8..934d18957 100644
--- a/internal/commands/artifact/run.go
+++ b/internal/commands/artifact/run.go
@@ -231,7 +231,7 @@ func (r *runner) scanBaseBranch(
 	return result, nil
 }
 
-func getIgnoredFingerprints(client *api.API, settings settings.Config, gitContext *gitrepository.Context) (
+func getIgnoredFingerprints(client *api.API, settings settings.Config, gitContext *gitrepository.Context, pullRequestNumber string) (
 	useCloudIgnores bool,
 	ignoredFingerprints map[string]ignoretypes.IgnoredFingerprint,
 	staleIgnoredFingerprintIds []string,
@@ -246,6 +246,7 @@ func getIgnoredFingerprints(client *api.API, settings settings.Config, gitContex
 		useCloudIgnores, ignoredFingerprints, staleIgnoredFingerprintIds, err = ignore.GetIgnoredFingerprintsFromCloud(
 			client,
 			gitContext.FullName,
+			pullRequestNumber,
 			localIgnoredFingerprints,
 		)
 		if err != nil {
@@ -309,6 +310,7 @@ func Run(ctx context.Context, opts flagtypes.Options) (err error) {
 		opts.GeneralOptions.Client,
 		scanSettings,
 		gitContext,
+		opts.PullRequestNumber,
 	)
 	if err != nil {
 		return err
diff --git a/internal/flag/repository_flags.go b/internal/flag/repository_flags.go
index d56396cf4..f065f4308 100644
--- a/internal/flag/repository_flags.go
+++ b/internal/flag/repository_flags.go
@@ -112,31 +112,32 @@ var (
 		DisableInConfig: true,
 		Hide:            true,
 	})
+	PullRequestNumberFlag = RepositoryFlagGroup.add(flagtypes.Flag{
+		Name:       "pull-request-number",
+		ConfigName: "repository.pull-request-number",
+		Value:      "",
+		Usage:      "Used when fetching branch level ignores for a PR/MR",
+		EnvironmentVariables: []string{
+			"PR_NUMBER",           // github
+			"CI_MERGE_REQUEST_ID", //gitlab
+		},
+		DisableInConfig: true,
+		Hide:            true,
+	})
 )
 
-type RepositoryOptions struct {
-	OriginURL        string
-	Branch           string
-	Commit           string
-	DefaultBranch    string
-	DiffBaseBranch   string
-	DiffBaseCommit   string
-	GithubToken      string
-	GithubRepository string
-	GithubAPIURL     string
-}
-
 func (repositoryFlagGroup) SetOptions(options *flagtypes.Options, args []string) error {
 	options.RepositoryOptions = flagtypes.RepositoryOptions{
-		OriginURL:        getString(RepositoryURLFlag),
-		Branch:           getString(BranchFlag),
-		Commit:           getString(CommitFlag),
-		DefaultBranch:    getString(DefaultBranchFlag),
-		DiffBaseBranch:   getString(DiffBaseBranchFlag),
-		DiffBaseCommit:   getString(DiffBaseCommitFlag),
-		GithubToken:      getString(GithubTokenFlag),
-		GithubRepository: getString(GithubRepositoryFlag),
-		GithubAPIURL:     getString(GithubAPIURLFlag),
+		OriginURL:         getString(RepositoryURLFlag),
+		Branch:            getString(BranchFlag),
+		Commit:            getString(CommitFlag),
+		DefaultBranch:     getString(DefaultBranchFlag),
+		DiffBaseBranch:    getString(DiffBaseBranchFlag),
+		DiffBaseCommit:    getString(DiffBaseCommitFlag),
+		GithubToken:       getString(GithubTokenFlag),
+		GithubRepository:  getString(GithubRepositoryFlag),
+		GithubAPIURL:      getString(GithubAPIURLFlag),
+		PullRequestNumber: getString(PullRequestNumberFlag),
 	}
 
 	return nil
diff --git a/internal/flag/repository_flags_test.go b/internal/flag/repository_flags_test.go
index 1eaa15f8e..7af935df9 100644
--- a/internal/flag/repository_flags_test.go
+++ b/internal/flag/repository_flags_test.go
@@ -285,3 +285,38 @@ func Test_getRepositoryGithubAPIURLFlag(t *testing.T) {
 
 	RunFlagTests(testCases, t)
 }
+
+func Test_getPullRequestNumberFlag(t *testing.T) {
+	testCases := []TestCase{
+		{
+			name:      "Repository PullRequestNumber. Default",
+			flag:      PullRequestNumberFlag,
+			flagValue: "",
+			want:      nil,
+		},
+		{
+			name: "Repository PullRequestNumber. PR_NUMBER env",
+			flag: PullRequestNumberFlag,
+			env: Env{
+				key:   "PR_NUMBER",
+				value: "42",
+			},
+			want: []string{
+				string("42"),
+			},
+		},
+		{
+			name: "Repository PullRequestNumber. CI_MERGE_REQUEST_ID env",
+			flag: PullRequestNumberFlag,
+			env: Env{
+				key:   "CI_MERGE_REQUEST_ID",
+				value: "24",
+			},
+			want: []string{
+				string("24"),
+			},
+		},
+	}
+
+	RunFlagTests(testCases, t)
+}
diff --git a/internal/flag/types/types.go b/internal/flag/types/types.go
index 09067e3e9..7af9d413c 100644
--- a/internal/flag/types/types.go
+++ b/internal/flag/types/types.go
@@ -92,15 +92,16 @@ type ReportOptions struct {
 }
 
 type RepositoryOptions struct {
-	OriginURL        string
-	Branch           string
-	Commit           string
-	DefaultBranch    string
-	DiffBaseBranch   string
-	DiffBaseCommit   string
-	GithubToken      string
-	GithubRepository string
-	GithubAPIURL     string
+	OriginURL         string
+	Branch            string
+	Commit            string
+	DefaultBranch     string
+	DiffBaseBranch    string
+	DiffBaseCommit    string
+	GithubToken       string
+	GithubRepository  string
+	GithubAPIURL      string
+	PullRequestNumber string
 }
 
 // GlobalOptions defines flags and other configuration parameters for all the subcommands
diff --git a/internal/util/ignore/ignore.go b/internal/util/ignore/ignore.go
index 8d0a9d5b5..0ac3b45a7 100644
--- a/internal/util/ignore/ignore.go
+++ b/internal/util/ignore/ignore.go
@@ -49,6 +49,7 @@ func GetIgnoredFingerprints(filePath string, target *string) (ignoredFingerprint
 func GetIgnoredFingerprintsFromCloud(
 	client *api.API,
 	fullname string,
+	pullRequestNumber string,
 	localIgnores map[string]types.IgnoredFingerprint,
 ) (
 	useCloudIgnores bool,
@@ -56,7 +57,8 @@ func GetIgnoredFingerprintsFromCloud(
 	staleIgnoredFingerprintIds []string,
 	err error,
 ) {
-	data, err := client.FetchIgnores(fullname, maps.Keys(localIgnores))
+
+	data, err := client.FetchIgnores(fullname, pullRequestNumber, maps.Keys(localIgnores))
 	if err != nil {
 		return useCloudIgnores, ignoredFingerprints, staleIgnoredFingerprintIds, err
 	}