Lena Stempfle πŸ’»

About Me

I am a postdoctoral researcher at MIT and the Broad Institute, working on reliable and trustworthy AI systems for healthcare and biomedical data. My research focuses on foundation model evaluation, multimodal and longitudinal health data, clinically grounded AI evaluation, and machine learning under missingness. I have worked on wearable foundation models, memorization and privacy risks in foundation models, interpretable machine learning, and large-scale health prediction systems. I completed my PhD in Computer Science at Chalmers University of Technology and have authored publications at venues including ICML, AISTATS, AAAI, and ML4H, including an ICML 2025 spotlight paper.

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Interests
  • Machine learning for health care
  • Interpretable AI
  • Predictions under missing values
  • Foundation Model Evaluation
  • Multimodal Learning
  • Causal Inference
Education
  • Postdoctoral Researcher

    Massachusetts Institute of Technology (MIT)

  • PhD Candidate in Machine Learning

    Chalmers University of Technology

  • M.Sc. Information Engineering and Management

    Karlsruhe Institute of Technology (KIT)

  • Visiting Research Student

    MIT - Massachusetts Institute of Technology, Cambridge/USA

  • Visiting Research Student

    PreMeDICaL Inria-Inserm team Montpellier, Montpellier/France

πŸ“š My Research

At the Healthy ML Lab, we take inspiration from real-world healthcare challenges to develop machine learning models and theory that improve clinical decision-making. Collaborating closely with clinician networks, hospitals, and healthcare providers, we aim to enhance decision-making, improve patient outcomes, and deepen our understanding of complex medical conditions. Our research spans fairness, privacy, interpretability, and human-AI interaction in healthcare, including studying how machine learning systems affect different patient groups, how biases emerge in medical data and models, and how AI can be designed and evaluated to support equitable and trustworthy clinical care.

I am a postdoctoral researcher at MIT and the Broad Institute, working on reliable and trustworthy AI systems for healthcare and biomedical data. My research focuses on foundation model evaluation, multimodal and longitudinal health data, clinically grounded AI evaluation, and machine learning under missingness. I have worked on wearable foundation models, memorization and privacy risks in foundation models, interpretable machine learning, and large-scale health prediction systems.

Let’s collaborate! πŸš€

πŸ“£ Recent News
πŸ€– Recent Publications
(2026). Clinically Grounded Privacy Evaluation of Medical LMs. In EMNLP 2026.
(2025). An Investigation of Memorization Risk in Healthcare Foundation Models. In Advances in Neural Information Processing Systems 38.
(2024). MINTY: Rule-based Models that Minimize the Need for Imputing Features with Missing Values. In Proceedings of AISTATS 2024.
(2023). Sharing Pattern Submodels for Prediction with Missing Values. In Proceedings of the AAAI Conference on Artificial Intelligence.
(2023). Learning replacement variables in interpretable rule-based models. In 3rd Workshop on Interpretable Machine Learning in Healthcare (IMLH).