De-identification for Health Data & AI Services is a cloud-based API service that applies machine-learning intelligence to extract and label, redact, or surrogate protected health information (PHI) from a variety of unstructured texts such as doctor's notes, clinical documents, clinical transcripts, and electronic health records. The service performs three key functions which are tag, redact, or surrogate, through synchronous (“real time”) or asynchronous (“batch”) API calls.