Diagnostic Reference Level (DRL) is a dose value that will be an indicator in optimizing patient radiation protection. This study aims to determine the national DRL value in Indonesia when examining patients using mammography and dental radiography. The method used in this study combines quantitative research and descriptive analysis. The patient radiation dose data used comes from the 2019 to 2024 dose survey from health facilities in Indonesia for each type of mammography and dental radiography examination. Based on data analysis, it has been proposed to be adopted as an Indonesian DRL value for dental radiography for the types of examinations Panoramic - Standard for pediatric patients and Cephalo - LAT, Panoramic - Standard, Panoramic - Front, Panoramic - Bitewing, Intraoral - Periapical Anterior, and Intraoral - Periapical molars in adult patients. The Indonesian DRL value for mammography for Cranial-Caudal and Mediolateral-Oblique examination types is also proposed. The proposed value to become Indonesia's DRL will be agreed upon and determined to be Indonesia's DRL value and will be applied for five years. After five years, a review was done to update Indonesia's DRL value. BAPETEN needs to guide the form of more intensive socialization and assistance to increase awareness and compliance in carrying out optimization through the use of DRL as well as compliance in recording and reporting patient radiation dose data to the National Patient Radiation Dose Data Information System (Si-INTAN). Keywords: Diagnostic Reference Level (DRL), optimization of radiation protection, radiation protection of patients, X-ray mammography, X-ray dental radiography