In data migration between different types of NoSQL databases, data may not be directly transferred to the targeted database compared to migration of data between the same types of database. This is due to the heterogeneity of the storage paradigm of the NoSQL databases. For example, when migrating data from a document-oriented database such as MongoDB, which stores data in JSON (Java Object Notation) format to Neo4j, a graph-oriented database stores data in nodes, the differences among these databases’ storage paradigms require different representations of the data model in the targeted graph-oriented database. This paper proposed a sequential approach to migrate data from MongoDB to Neo4j. The approach migrates MongoDB data to Neo4j and verifies the migrated data using a comparative method. The paper discusses the migration algorithm and how complex fields in MongoDB, such as nested documents, are presented in Neo4j.