SCOTTSDALE, AZ-Healthcare Trust of America Inc. is under contract to acquire five on-campus medical office buildings for $86.1 million. The non-traded REIT has closed on three of the five class A buildings, paying $56.9 million, and plans to close on the other two by the end of the year.

HTA is buying the 307,000-square-foot portfolio from Rendina Cos., which developed the properties. The Jupiter, FL-based approached HTA directly about acquiring the portfolio, which is located in Arizona, Florida, Missouri, Nevada and New York.

Mark Engstrom, who heads up HTA’s acquisitions team as executive vice president, says acquiring portfolios from national MOB developers provides HTA with properties that include “the latest medical office design and technology to accommodate future changes in health care delivery.”