HIPAA does not cover your landlord - but it may cover the person who gave him the ambulance report. The police report is not covered by HIPAA - no matter how or from whom he got it.
This response is intended to provide general information, but not legal advice. The response may be different if there are other or different facts than those included in the original question. See MKnutsonLaw.com for more information on why this communication is not privileged or create an attorney-client relationship.