An AI project team in the healthcare sector is tasked with developing a predictive model...

In the PMI-CPMAI body of knowledge, healthcare AI initiatives are repeatedly framed as data-intensive efforts that must integrate heterogeneous sources such as EHRs, patient-reported outcomes, and unstructured clinical narratives. The guidance stresses that “unstructured sources, including physician notes and narrative reports, often contain critical clinical context that will not appear in structured fields,” and that project teams must use techniques that can reliably extract this information into analysis-ready form to achieve completeness and reliability of the dataset. This is where natural language processing (NLP) is highlighted as a key enabler: by systematically parsing and extracting diagnoses, treatments, comorbidities, timelines, and outcomes from free-text clinical notes, NLP makes these rich but messy data usable alongside structured EHR fields and survey data.

PMI-CPMAI also emphasizes that simply adding more data or distributing training (such as data augmentation or federated learning) does not guarantee that the underlying data are comprehensive; what matters is that all relevant signals are captured and normalized across modalities. NLP directly supports this by converting unstructured text into standardized features, reducing omissions and manual abstraction errors. Real-time EHR integration improves freshness, but not necessarily coverage across all sources. Therefore, to ensure the data is comprehensive and reliable for a readmission prediction model, employing NLP to extract relevant data from clinical notes is the most effective technique among the options.