Meddies-PII: A Multilingual Framework for Personally Identifiable Information Extraction in Clinical De-identification
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Computer Science > Computation and Language
arXiv:2609.12544 (cs)
[Submitted on 11 Sep 2026]
Title:Meddies-PII: A Multilingual Framework for Personally Identifiable Information Extraction in Clinical De-identification
View a PDF of the paper titled Meddies-PII: A Multilingual Framework for Personally Identifiable Information Extraction in Clinical De-identification, by Linh Uyen Le and 2 other authors
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Abstract:Clinical de-identification relies on accurately identifying personally identifiable information (PII). However, manually annotated datasets are costly to construct, while existing synthetic alternatives often provide limited details about their generation process or rely on relatively simple synthesis strategies. We introduce Meddies-PII-Dataset, a corpus of one million synthetic clinical documents spanning seventeen languages and nine PII labels. The documents are generated using attribute-conditioned prompts and validated through thirteen deterministic gates that enforce structural and annotation consistency. To evaluate the dataset's utility, we train Meddies-PII-Model, a BIOES token classifier, and compare it with existing PII extraction systems using exact-match entity-level F1. Meddies-PII-Model achieves the highest performance among the evaluated systems on all reported benchmarks, with a mean F1 of 0.827 across fifteen external benchmarks, compared with 0.658 for the strongest baseline. Upon acceptance, we will publicly release the dataset, benchmark suite, model, generation framework, and evaluation code to support research on multilingual clinical de-identification.
| Subjects: | Computation and Language (cs.CL); Artificial Intelligence (cs.AI) |
| Cite as: | arXiv:2609.12544 [cs.CL] |
| (or arXiv:2609.12544v1 [cs.CL] for this version) | |
| https://doi.org/10.48550/arXiv.2609.12544
arXiv-issued DOI via DataCite (pending registration)
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View a PDF of the paper titled Meddies-PII: A Multilingual Framework for Personally Identifiable Information Extraction in Clinical De-identification, by Linh Uyen Le and 2 other authors
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