1. Introduction: Health literacy is gaining attention in research and policy with increasing recognition of the critical role of health professionals. Health professionals help clients overcome health literacy challenges, which negatively and expensively impact health outcomes. However, most studies on health literacy focus on the health literacy status and competencies of the general population. In this systematized review, we identify existing instruments that aim to measure the health literacy of health professionals. We describe the instruments according to their constructs, and their reliability and validity.

2. Methods: We completed a systematized review in Ovid MEDLINE, Ovid PsycINFO, and Scopus in July 2018. We used relevant MeSH search terms and keywords, as well as reference lists of identified papers. We assessed full texts of all articles for inclusion and extracted relevant information.

3. Results: Only three of 252 identified articles were included in our review: health literacy practices and educational competencies for health professionals (HLPECHP); health literacy competencies for European health care personnel (HLCEHCP); and instrument of health literacy competencies (IOHLC) for Chinese-speaking health professionals. All three instruments identified important health professional health literacy (HPHL) constructs encompassing knowledge, attitudes, and skills. Only the IOHLC verified the competencies rigorously using reliability and validity measures. 

4. Conclusions: In the field of health literacy, there are only three existing instruments (HLPECHP, HLCEHCP, IOHLC) to measure the health literacy of professionals. Among the three identified instruments, only the IOHLC has been validated. Our findings highlight the need to develop and validate more HPHL instruments across different countries and settings. With validated instruments, we can evaluate HPHL and make appropriate recommendations about tailored patient education programs and trainings in universities and health care sectors.

Keywords: health literacy, health professional, instruments, measurement, review

Disclosure: Parts of this research have been presented at the 2^nd ASEAN University Network International Health Promotion Conference, Manila, Philippines, 21 August 2019