MediLedger

MediLedger is a blockchain-based hospital management system built for the Starknet ecosystem using Cairo smart contracts. Our goal is to make medical record sharing secure, transparent, and truly patient-centric. With MediLedger, patients have full control over who can access their health data, while hospitals can request, view, and update records only with explicit patient approval.

The Problem & Our Solution

Today, medical records are often siloed, hard to share, and vulnerable to tampering or unauthorized access. Patients rarely have true ownership of their data, and hospitals face friction when collaborating across systems. This leads to delays in care, privacy risks, and administrative headaches.

Where can this be applied?

• Hospitals and clinics looking to modernize patient data management

• Health NGOs and research organizations needing secure, consent-driven data sharing

• Any healthcare system where patient privacy and data integrity are critical

Key Features

• Decentralized, permissioned medical record storage

• Patient-controlled data access and sharing

• Hospital access requests and patient approvals

• Tamper-proof record updates and audit trails on Starknet

• Usage-based subscription model for hospitals

Actors in the System

Patients

• Register with a unique ID

• Own and control access to their medical records

• Approve or revoke hospital access at any time

• View their own records

Hospitals

• Register with a unique ID

• Request access to patient records

• Append new records to a patient’s history (if authorized)

• Operate under an access request limit, with a subscription fee for additional requests

MediLedger solves this by:

• Giving patients the power to approve or revoke hospital access to their records at any time

• Making all access and updates transparent and tamper-proof on Starknet

• Enabling hospitals to request and append records in a permissioned, auditable way

• Supporting a fair usage model for hospitals, with a subscription for high-volume access