Healthcare staffing provider Health Carousel acquired Onyx M.D., a locum tenens physician and advance practice staffing company.

Onyx M.D. has corporate offices in Denver and Dallas; it has approximately 40 internal employees. It will continue to operate under its own brand after the transaction.

Jim Chandler and Robert Moghim co-founded Onyx M.D. in 2005. Chandler will continue to lead Onyx M.D. after the acquisition; Moghim, a board-certified anesthesiologist, will focus on Colorado Pain Care, a Denver-area pain management practice that he also co-founded and currently serves as CEO.

The transaction closed Feb. 15; terms were not disclosed.

Health Carousel ranks No. 17 on Staffing Industry Analyst’s list of largest US healthcare staffing firms. Plans call for Onyx M.D. to work with NEXTLocums, another Health Carousel locum tenens brand. NEXTLocums is led by Stacey Stanley, who is also the current president of the National Association of Locum Tenens Organizations.