The house was later transferred to the Rochester Park and Recreation Department and is now used as a museum and a rental facility for special events.

Plummer was also a successful scientist and inventor; Plummer invented the modern "dossier" system - a system he thought superior to the traditional 'pen & paper' - that assigns each medical patient an ID and stores all that patient's information in a single folder chronologically.

Under the guidance of Plummer, the 1914 building allowed the integrated group medical practice concept to be fully expressed.

One intriguing innovation was the Rookwood fountain in the main lobby that was designed to clean and humidify air from the outside.

But perhaps one of his greatest contributions to medicine was the development and implementation of the integrated private medical group practice.

"[citation needed][3] His innovative contributions to medical systems and building designs, as well as his early understanding of the importance of the diagnostic and research aspects of the clinical practice, allowed for the creation of the integrated group practice, as well as medical specialization.

The Plummer effect is an intrathyroidal feed-forward mechanism preventing thyrotoxicosis in situations of high iodine load.

His wife, the former Daisy Berkman, was the niece of the Mayo Brothers; they had two adopted children, Robert and Gertrude.