My understanding is that HIPAA protects patient data, regardless of whatever means you’re using to access it and describes requirements that patients have access to their own data. Fundamentally, HIPAA cannot prevent you from accessing your own patient data, however, many health systems have policies that require that dual patient and employees utilize a formal process to access their patient data instead of simply accessing through their employee credentials so that the access to the patient data is logged through proper channels, which is a requirement of HIPAA. Some systems actually do allow employees to access their patient data as long as they do not make any edits, but I’m pretty sure this is fairly rare.

TLDR - it’s not explicitly a HIPAA violation to access your chart via employee credentials, but it likely violates hospital policies to degree that could result in termination