Is OwnCloud HIPAA compliant?
According to What is HIPAA Compliance? | HIPAA Compliant Cloud Services | Otava it depends on the setup.
If you host it on-site, use a safe https configuration, offsite backups, logging/auditing, listen to ownCloud file integrity warnings, and also implement some physical safeguards (like a lock at the server room door), it seems to be compliant.
I am neither a lawyer nor a US citizen though.