The Prism Fuzzy Number is the integrating form of Triangular and Trapezoidal fuzzy numbers, offering various applications. This study aims to examine the non-membership degree of a Prism Fuzzy Number, which is crucial for reducing uncertainty. In this article, we introduce the idea of Prism Intuitionistic Fuzzy Number covering its mathematical operations, \(\alpha \) -cut, \(\beta \) -cut, value index, ambiguity index, and its theorems. Additionally, a novel method of grading is proposed that incorporates value and ambiguity indicators. A decision-making analysis is presented to show the efficacy of the suggested approach.