PMSCO provides external peer review services on behalf of hospital medical staffs. Use of external peer review services allows executive medical staffs to avoid financial and professional conflicts that may arise during the peer review process.

PMSCO's clients for external peer review are medical staff executive committees, health systems, law firms, and state government agencies.

PMSCO's URAC-accredited Independent Review Organization (IRO) offers a panel of hundreds of physician reviewers to assist with meeting the Joint Commission's Medical Staff Standards. PMSCO's reviewers are fully credentialed, maintaining board certification within their respective specialty, and are actively practicing.