The HouseCalls / Symptom Checker care guides are adapted from the professional protocols written for use by nurses in medical call centers and physician practices.  The professional versions are rigorously reviewed by panels of physicians and nurses with experience in telephone triage.  The Review Panels are comprised of triage nurses, specialty nurses, call center medical directors, primary care physicians, emergency physicians and physician specialists.

Each year, once the review process is completed for the professional protocol versions, the HouseCalls content is edited to ensure its compatibility and consistency with any updates made. The care guides are updated on an annual basis, based upon recent medical literature, recent national guidelines, quality improvement projects, research, expert reviews and feedback from users.