Final answer:
A Staff-Model HMO is the type of HMO where all the doctors are employed by the HMO and housed in the same building.
Step-by-step explanation:
The type of HMO where all the doctors are employed directly by the HMO and housed in the same building is called a Staff-Model HMO. In this model, the HMO directly employs the doctors and they provide care at a specific location, often within the HMO building. This type of HMO offers a convenient and integrated approach to healthcare.