Introduction: Consideration of Health Impacts of Non-Health Sector Policies has been Developed in Many Countries. Health Impact Assessment is a Methodology which Enables the Identification, Prediction and Evaluation of the Likely Changes in Health, Both Positive and Negative, of a Policy, Programmer or Development Action on a Defined Population. These Changes may be Direct and Immediate or Indirect and Delayed.

  Literature Review: This Study is Narrative Review and was Conducted to Review the Health Impact Assessment Models and the Existing Models to Consider Eight Main Models from a Broad and Tight Perspective. The Eight Models Reviewed, Four Models have Tight Perspective and Four Models have Broad Perspective. There are Differences between the Health Impact Assessment Process, Tools Used in this Process and Consideration of Health Disparities.

  Discussion: It is Noted that HIA should Focus on Areas Where Change is Possible and Partners/ Decision/ Policy Makers are willing to Implement any Recommendations Developed. Despite the Differences between these Models, it is important to Considering the Importance of Health Issues to Planning and Decision-Making Outside the Health Sector.