NTP is an interagency program composed of, and supported by, three government agencies within the Department of Health and Human Services:

The NIEHS Director also serves as the director of NTP. The Director reports to the Assistant Secretary for Health, and receives regular input from various external groups. Rick Woychik, Ph.D., is the NIEHS and NTP Director.

National Toxicology Program

(Headquartered administratively at NIEHS)

What is the relationship between NTP and the Division of Translational Toxicology?
NTP is the National Toxicology Program; its activities are supported by the Division of Translational Toxicology (DTT), an intramural research division located at NIEHS in Research Triangle Park, North Carolina. You can learn more about DTT here.