diff --git a/packages/react-native-codegen/src/parsers/__tests__/parsers-primitives-test.js b/packages/react-native-codegen/src/parsers/__tests__/parsers-primitives-test.js
index 2d3cec0343bc87..03bc6ab6dc3583 100644
--- a/packages/react-native-codegen/src/parsers/__tests__/parsers-primitives-test.js
+++ b/packages/react-native-codegen/src/parsers/__tests__/parsers-primitives-test.js
@@ -15,7 +15,8 @@ const {
   emitBoolean,
   emitNumber,
   emitInt32,
-} = require('../parsers-primitives.js');
+  emitRootTag,
+} = require('../parsers-primitives');
 
 describe('emitBoolean', () => {
   describe('when nullable is true', () => {
@@ -94,3 +95,29 @@ describe('emitNumber', () => {
     });
   });
 });
+
+describe('emitRootTag', () => {
+  const reservedTypeAnnotation = {
+    type: 'ReservedTypeAnnotation',
+    name: 'RootTag',
+  };
+
+  describe('when nullable is true', () => {
+    it('returns nullable type annotation', () => {
+      const result = emitRootTag(true);
+
+      expect(result).toEqual({
+        type: 'NullableTypeAnnotation',
+        typeAnnotation: reservedTypeAnnotation,
+      });
+    });
+  });
+
+  describe('when nullable is false', () => {
+    it('returns non nullable type annotation', () => {
+      const result = emitRootTag(false);
+
+      expect(result).toEqual(reservedTypeAnnotation);
+    });
+  });
+});
diff --git a/packages/react-native-codegen/src/parsers/flow/modules/index.js b/packages/react-native-codegen/src/parsers/flow/modules/index.js
index b9a7e99f196c43..e53276b723e470 100644
--- a/packages/react-native-codegen/src/parsers/flow/modules/index.js
+++ b/packages/react-native-codegen/src/parsers/flow/modules/index.js
@@ -37,6 +37,7 @@ const {
   emitBoolean,
   emitNumber,
   emitInt32,
+  emitRootTag,
 } = require('../../parsers-primitives');
 const {
   IncorrectlyParameterizedGenericParserError,
@@ -87,10 +88,7 @@ function translateTypeAnnotation(
     case 'GenericTypeAnnotation': {
       switch (typeAnnotation.id.name) {
         case 'RootTag': {
-          return wrapNullable(nullable, {
-            type: 'ReservedTypeAnnotation',
-            name: 'RootTag',
-          });
+          return emitRootTag(nullable);
         }
         case 'Promise': {
           assertGenericTypeAnnotationHasExactlyOneTypeParameter(
diff --git a/packages/react-native-codegen/src/parsers/parsers-primitives.js b/packages/react-native-codegen/src/parsers/parsers-primitives.js
index 96c727b80c1243..55c3e0de8d4e6c 100644
--- a/packages/react-native-codegen/src/parsers/parsers-primitives.js
+++ b/packages/react-native-codegen/src/parsers/parsers-primitives.js
@@ -15,6 +15,7 @@ import type {
   Int32TypeAnnotation,
   NativeModuleNumberTypeAnnotation,
   Nullable,
+  ReservedTypeAnnotation,
 } from '../CodegenSchema';
 
 const {wrapNullable} = require('./parsers-commons');
@@ -39,8 +40,16 @@ function emitNumber(
   });
 }
 
+function emitRootTag(nullable: boolean): Nullable<ReservedTypeAnnotation> {
+  return wrapNullable(nullable, {
+    type: 'ReservedTypeAnnotation',
+    name: 'RootTag',
+  });
+}
+
 module.exports = {
   emitBoolean,
   emitInt32,
   emitNumber,
+  emitRootTag,
 };
diff --git a/packages/react-native-codegen/src/parsers/typescript/modules/index.js b/packages/react-native-codegen/src/parsers/typescript/modules/index.js
index ec8ac8d9d5460c..97ea838a47472f 100644
--- a/packages/react-native-codegen/src/parsers/typescript/modules/index.js
+++ b/packages/react-native-codegen/src/parsers/typescript/modules/index.js
@@ -37,6 +37,7 @@ const {
   emitBoolean,
   emitNumber,
   emitInt32,
+  emitRootTag,
 } = require('../../parsers-primitives');
 const {
   IncorrectlyParameterizedGenericParserError,
@@ -199,10 +200,7 @@ function translateTypeAnnotation(
     case 'TSTypeReference': {
       switch (typeAnnotation.typeName.name) {
         case 'RootTag': {
-          return wrapNullable(nullable, {
-            type: 'ReservedTypeAnnotation',
-            name: 'RootTag',
-          });
+          return emitRootTag(nullable);
         }
         case 'Promise': {
           assertGenericTypeAnnotationHasExactlyOneTypeParameter(