Businesses that provide support services to individual physicians are called

Businesses that provide support services to individual physicians are called management service organizations.

A healthcare management service organization provides its providers non-clinical services, so they’d have enhanced revenues, improved quality and contained costs. Their practices receive notable administrative assistance while their physicians can maintain increased level of autonomy.

Organizations that offer help administrations to singular doctors are called administration benefit associations.  

Explanation:

A social insurance administration benefit association gives its suppliers non-clinical administrations, so they'd have upgraded incomes, enhanced quality and contained expenses. Their practices get remarkable managerial help while their doctors can keep up expanded level of self-governance.

answer: d is correct