Excelerate Health Ventures has added $1.8 million to its Physician Fund, an angel fund that formed last year to make seed and early stage investments in health care technologies.

When Research Triangle Park-based Excelerate launched last July, the firm said it had raised $5.1 million in funding. At that time, 38 investors had committed investments to the fund. Updated securities filings show that the fund now has $6.9 million in investments from 52 investors.

On its website, Excelerate describes its Physician Fund as an investment vehicle designed for physicians, dentists and healthcare investors “to invest in what we know, capitalizing on your extensive domain expertise and experience, and investing alongside professional investors with the goal of diversifying from the creation of successful healthcare companies.” When Excelerate launched, the firm said that Physicians Fund could reach a funding target of $15 million.

Excelerate was founded by entrepreneurs and angel investors Gary Abrahams and Bobby Bahram. Dr. Cam Patterson, associate dean of UNC Healthcare Entrepreneurship and chief of cardiology at UNC Chapel Hill, is working as an advisor to Physician Fund.

“The goal is to use the interdisciplinary knowledge and experience of the extended team to identify and create highly valued relevant healthcare companies in a shortened time frame, while maximizing return for everyone involved,” Patterson said at the time of Excelerate’s launch last year.