Congress granted qualified immunity from liability for peer review participation to physicians, osteopaths and dentists, created a national practitioner data bank to track inept, incompetent or unprofessional physicians, and enacted procedural rules for due process, privilege restrictions, and reporting and disbursement of information. The Health Care Quality Improvement Act of 1986 is now in full force, and peer review participants are anxious to cloak themselves with immunity from actions brought by health care professionals. Although its goals are worthy, HCQIA's effects remain to be seen. Serious loopholes appear to exist, warranting close monitoring and possibly early amendment of the Act. Cautious judicial assessment is needed, in order to prevent not only circumvention of the Act's requirements by artful litigants, but also use of the national data bank by health care entities as a pretext for denying privileges and escaping antitrust liability.