diff --git a/modules/dmdIdSystem.js b/modules/dmdIdSystem.js
index e08c8a6da82..7cf7b9fac95 100644
--- a/modules/dmdIdSystem.js
+++ b/modules/dmdIdSystem.js
@@ -23,8 +23,8 @@ export const dmdIdSubmodule = {
    * @returns {(Object|undefined)}
    */
   decode(value) {
-    return value && typeof value['dmd-dgid'] === 'string'
-      ? { 'dmdId': value['dmd-dgid'] }
+    return value && typeof value === 'string'
+      ? { 'dmdId': value }
       : undefined;
   },
 
@@ -32,9 +32,11 @@ export const dmdIdSubmodule = {
    * performs action to obtain id and return a value in the callback's response argument
    * @function getId
    * @param {SubmoduleConfig} [config]
+   * @param {ConsentData}
+   * @param {Object} cacheIdObj - existing id, if any consentData]
    * @returns {IdResponse|undefined}
    */
-  getId(config) {
+  getId(config, consentData, cacheIdObj) {
     try {
       const configParams = (config && config.params) || {};
       if (
@@ -44,6 +46,8 @@ export const dmdIdSubmodule = {
       ) {
         utils.logError('dmd submodule requires an api_key.');
         return;
+      } else {
+        return cacheIdObj;
       }
     } catch (e) {
       utils.logError(`dmdIdSystem encountered an error`, e);
diff --git a/test/spec/modules/dmdIdSystem_spec.js b/test/spec/modules/dmdIdSystem_spec.js
index 0de7533e6a7..9c603eebbd5 100644
--- a/test/spec/modules/dmdIdSystem_spec.js
+++ b/test/spec/modules/dmdIdSystem_spec.js
@@ -38,11 +38,11 @@ describe('Dmd ID System', function() {
   });
 
   it('should return undefined if invalid dmd-dgid passed into decode', function () {
-    expect(dmdIdSubmodule.decode({'dmd-dgid': 123})).to.be.undefined;
+    expect(dmdIdSubmodule.decode(123)).to.be.undefined;
   });
 
   it('should return dmdId if valid dmd-dgid passed into decode', function () {
     let data = { 'dmdId': 'U12345' };
-    expect(dmdIdSubmodule.decode({'dmd-dgid': 'U12345'})).to.deep.equal(data);
+    expect(dmdIdSubmodule.decode('U12345')).to.deep.equal(data);
   });
 });