Professional Protective Alliance is located at #2 University Plaza, Hackensack, NJ 07601. Contact Us 201-621-9007. Insurance Agency, Dental Insurance Agency, Physician Insurance, Attorney Insurance. With 80 years of proud service to our dental, physician and legal communities, Professional Protective Alliance draws upon our unsurpassed levels of skill and commitment to ensure intelligent insurance solutions to each of our clients. If your professional service results in financial losses to your