He co-founded with Warner V. Slack the Division of Computer Medicine at Harvard Medical School in 1970. The Division was among the first academic divisions to concentrate on the use of computers for patient care, teaching and medical research.[2]
Bleich's research and work is associated within medical informatics, a field he helped pioneer. He developed computer-based systems aimed at improving clinical care. In the late 1960s, he developed an "Acid-Base Therapy Advisor," a system that not only suggested diagnoses but also recommended treatment.[8][9]
In 1970, Bleich, with the support of Howard Hiatt, recruited Warner Slack to co-found the "Division of Computer Medicine". He developed systems such as the Medical Information Retrieval System (MISAR) which was the basis for the Veteran’s Administrations hospital information system’s “Fileman” and the end-user literature searching program "PaperChase" which was the forerunner of the National Library of Medicine’s PubMed. These systems laid the foundation for modern medical information systems.[10][11]
In 1977, Bleich and Slack computerized medical records over a period of 5 years at Boston’s Beth Israel Hospital.[12]
In 1983, Bleich and Slack ported their computer system from Boston’s Beth Israel Hospital to Brigham and Women's Hospital, leading to the establishment of the Center for Clinical Computing. In addition to computerizing all clinical and ancillary functions within the hospital, the BWH system included a full suite of financial applications. Their system, named the CCC system, laid foundation in clinical informatics, evolving to meet the needs of healthcare professionals and patients alike.[13]
Bleich, Howard L.; Slack, Warner V. (January 2010). "Reflections on electronic medical records: When doctors will use them and when they will not". International Journal of Medical Informatics. 79 (1): 1–4. doi:10.1016/j.ijmedinf.2009.10.002.
Slack, Warner V.; Bleich, Howard L. (June 1999). "The CCC system in two teaching hospitals: a progress report". International Journal of Medical Informatics. 54 (3): 183–196. doi:10.1016/S1386-5056(99)00006-4.
Bleich, H (1998). "Why good hospitals get bad computing". Stud Health Technol Inform. 52 Pt 2. ISSN0926-9630.
Zieman, Y. L.; Bleich, H. L. (1997). "Conceptual mapping of user's queries to medical subject headings". Proceedings: a conference of the American Medical Informatics Association. AMIA Fall Symposium: 519–522. ISSN1091-8280.
^Record, Institute of Medicine (US) Committee on Improving the Patient; Dick, Richard S.; Steen, Elaine B.; Detmer, Don E. (1997). "Computer-Based Patient Record Technologies". The Computer-Based Patient Record: Revised Edition: An Essential Technology for Health Care. National Academies Press.