Final answer:
The CAM category that fits the description is ethnomedicine.
Step-by-step explanation:
The CAM category that is built upon complete systems of theory and practice, which have evolved apart from and earlier than the conventional medical approach used in the US, is known as ethnomedicine.
Ethnomedicine refers to a culture's traditional knowledge and treatments for the management of health and illness. It is rooted in cultural values, practices, and historical context, and may incorporate various healing practices and beliefs.
Examples of ethnomedicine include Chinese traditional medicine, Ayurvedic medicine, and homeopathic medicine, which are widely used alongside biomedicine in many societies.