Fix patient ID mapping issue in Healthcare AI SaaS API

We need a developer to resolve a patient ID mapping issue in our Healthcare AI SaaS API. The task involves identifying the root cause, debugging the issue, and implementing a reliable fix. You should be comfortable working with API logic, data mapping, and troubleshooting integration problems. Experience with healthcare systems or similar SaaS platforms is a plus. This is a small, short-term project for someone who can quickly diagnose and fix the issue.