In online healthcare systems, patient data confidentiality and integrity are the primary concerns. After COVID-19, we have seen that the usability of the online healthcare system has increased significantly. However, in this scenario, there is a need to protect the security of the patient data. Since a patient’s data might become vulnerable when unauthorized changes are made, there is a need for a strategy where if any alteration is made, it can be easily detected. This paper provides a blockchain framework to validate the patient’s test report. Initially, the patient data is captured by the Medical Diagnostic Center (MDC), and subsequently, lossless compression is applied to the patient data for proper bandwidth utilization. Here, the MDC applied a partial encryption process on medical data for uploading into the InterPlanatary File System (IPFS). The encryption is carried out using Advanced Encryption Standard (AES) in Galois Counter Mode (GCM). The practitioners can retrieve the secure medical test data through the suggested blockchain framework, and subsequently, they can check the integrity of the data before considering their treatment process. Overall, the system preserves the security of the patient data, and legitimate users can access the data securely. The suggested mechanism has been implemented using a private Ethereum blockchain. Overall, the proposed framework is suitable for preserving the security of the patient data.