Ray-Yuan (Ray) Chung

Ray-Yuan (Ray) Chung

Hi,I'm Ray, a PhD student at the University of Washington, conducting research on human-centered AI for health. I'm also a dietitian with experience in mental health and health tech.

Curriculum Vitae

Download CV as PDF

Ray-Yuan (Ray) Chung

🎓 Education

2023–2027 (anticipated)
University of Washington, Seattle, WA
Ph.D. in Biomedical and Health Informatics, Concentration: HCI and AI/ML
2018–2020
University of Michigan, Ann Arbor, MI
M.P.H. in Nutritional Sciences and Dietetics
2013–2017
National Chung-Hsing University, Taichung, Taiwan
B.S., Concentration: Pre-Med

🔬 Relevant Experience

Sep 2024–Present
Unita Health, Santa Clara, CA (Remote)
Human-AI Interaction Researcher
  • Led end-to-end development of an LLM-based conversational agent for gastrointestinal health by building a RAG pipeline, incorporating prompt engineering and iterative evaluation.
Sep 2023–Present
University of Washington, Seattle, WA
Graduate Researcher
  • Co-Design AI Intervention: Led co-design workshops with kidney patients, caregivers, and clinicians to develop an AI-powered value alignment tool.
  • LLM Chatbot for Older Adults: Developed and evaluated a chatbot with accessible features for older adults using OpenAI API and Streamlit.
  • Online Health Misinformation: Applied mixed-effects regression and LLaMA-based text classification (few-shot + CoT prompting) to study user engagement and perception of health misinformation on YouTube.
  • Health Device Usability: Conducted interviews and surveys with cystic fibrosis patients to evaluate the usability of an at-home lung monitoring device.
  • Video Content Filter: Built and tested a multimodal classifier (BERT + ViT) to flag pro-eating disorder content on YouTube.
Jun 2024–Sep 2024
Dexcom, San Diego, CA
User Experience Research Intern
  • Conducted mixed-methods user research (TTM-informed surveys and interviews) to inform CGM product development and behavioral feature design.
May 2022–Aug 2023
Impossible Foods, Redwood City, CA
Research Scientist
  • Analyzed large-scale ingredient and nutrient datasets to inform product innovation.
Mar 2021–May 2021
Heali AI, Remote
AI Researcher
  • Curated and annotated nutrition datasets to train an AI menu scanner for personalized dietary insights.

đź“š Publications

  • Feng Chen, Manas Satish Bedmutha, Ray-Yuan Chung, Janice Sabin, Wanda Pratt, Brian R Wood, Nadir Weibel, Andrea L Hartzler, Trevor Cohen. Toward Automated Detection of Biased Social Signals from the Content of Clinical Conversations. 2025. AMIA Annual Symposium Proceedings.
  • Luna Xingyu Li, Ray-Yuan Chung, Feng Chen, Wenyu Zeng, Yein Jeon, Oleg Zaslavsky. Learning from Elders: Making an LLM-powered Chatbot for Retirement Communities more Accessible through User-centered Design. 2025. In Proceedings of the CALD-AI Workshop at ASIS&T.
  • Ray-Yuan Chung, Feng Chen, Yein Jeon, Oleg Zaslavsky. Improve Technology and EHealth Literacy in a Retirement Community via the Use of LLM-Powered Chatbot. 2024. Innovation in Aging.
  • Prasad P Devarshi, Ray-Yuan Chung, Carroll A Reider, Ryan W Grant, Susan Hazels Mitmesser. Nutrient Gaps in US Adults by Age and Gender: Vitamin A, D, E, K, C, Magnesium, Calcium, Choline and Dietary Fiber. 2020. Journal of the Academy of Nutrition and Dietetics.
  • Carroll A Reider, Ray-Yuan Chung, Prasad P Devarshi, Ryan W Grant, Susan Hazels Mitmesser. Inadequacy of immune health nutrients: intakes in US adults, the 2005–2016 NHANES. 2020. Nutrients.

🏆 Awards

  • Top Scholars Award, UW (2023)
  • Global Scholars Award, NSF International (2018–2020)
  • Maxine Moore Scholarship, UM SPH (2019)

đź›  Skills

Programming & Tools: Python, R, JavaScript, PyTorch, TensorFlow, Hugging Face, LangChain, Docker, Git, Tableau, RedCap
AI/ML: LLMs, Fine-tuning, Prompt Engineering, RAG, Multi-Agent Systems, NLP, Multimodal Learning, Causal Inference, Reinforcement Learning
UX/HCI: Interviews, Focus Groups, Surveys, Usability Testing, A/B Testing, Regression Modeling, Inclusive Design, Participatory Design
Behavioral Science: Behavior Change Design, Health Behavior Theories

đź’Ľ Other Professional Experience

Mar 2021–Aug 2023
So Basic Co., Seattle, WA
Healthcare Product Consultant
  • Led supplement ingredient research to ensure compliance with FDA and international health regulations, supporting product development and market launch.
Jun 2021–Apr 2022
Eating Recovery Center, Bellevue, WA
Clinical Dietitian
  • Delivered comprehensive nutrition assessments and interventions for patients with complex eating and mental health disorders, collaborating in interdisciplinary care teams.
Jan 2019–Apr 2020
University of Michigan, Ann Arbor, MI
Graduate Researcher
  • Collected and managed behavioral and physiological data in REDCap for a randomized trial on HIIT and weight management.
Jan 2019–Apr 2020
University of Michigan Athletics, Ann Arbor, MI
Performance Nutrition Intern
  • Supported NCAA Division I athletes with personalized assessments, data-informed meal plans, and education to optimize performance and recovery.
Jun 2019–Aug 2019
Pharmavite, West Hills, CA
Research and Development Intern
  • Analyzed NHANES dietary data to inform data-driven public health strategy and product development decisions.
Jan 2018–Jul 2018
TaskUs / Valve, Taipei, Taiwan
User Experience Analyst – Team Lead
  • Led UX analysis of Steam platform usage trends, driving product insights that improved user satisfaction by 180%.

đź“ś Affiliations / Licensures

  • Registered Dietitian (ID: 86289001)
  • Cert. Sports Nutrition Specialist, Taiwan Society for Sports Nutrition
  • The DUB Group at University of Washington