Though Viber claims to provide end-to-end encryption for its communications services, it does not appear to enable HIPAA compliance.
The Viber website addresses end-to-end encryption and various security measures for the platform, but there is no mention of HIPAA or Business Associate Agreements (BAA) on its website.
HIPAA regulations require a signed BAA as well as audit logs, access controls, access logs, and more. End-to-end encryption on its own does not ensure HIPAA compliance.