Management of disparate healthcare-related systems of nomenclature and vocabularies containing underlying concepts and/or code sets that represent the virtual universe of diagnoses, procedures, medications, tests, measurements that relate to events, encounters, exposures and/or episodes that appear in observational health data. Providing access to data and databases containing healthcare and biomedical related standard and non-standard terminologies as well as ontologies, taxonomies, crosswalks and concept groups. Providing compilation and systemization of information into computer databases, namely, vocabulary suites, namely, terminology groupings in the fields of healthcare that crosslink common medical synonyms, acronyms, phrases, and lexical variants and provide links to related terms, textual descriptions, and diagnostic and billing codes within other medical databases to achieve semantic interoperability; medical data aggregation system and knowledge platform, namely, Platform as a Service (PAAS) featuring software for medical data aggregation