Secure AWS-based Healthcare System Development

I need a comprehensive and secure healthcare system developed on AWS. The system should include:

- Patient registration
- EHR storage (including patient medical history, diagnostic reports, prescription information)
- Doctor/admin access
- Claim submission with automated validation
- Rule-based fraud detection
- Role-based dashboards

The system should utilize cloud databases with encrypted, API-driven interoperability.

Ideal Skills and Experience:
- Strong experience with AWS
- Expertise in building secure EHR systems
- Proficiency in API development and cloud databases
- Knowledge of fraud detection mechanisms
- Strong background in role-based access control and dashboards

Please ensure the authentication method is username and password.