What is the collective noun for group of doctors?

The collective nouns for doctors are

• a dose of doctors
• a doctrine of doctors
• a scope of doctors
• a field of doctors

In everyday terms, doctors are generally grouped with "College" (the College of Physicians and Surgeons), an "Association" (the Association of Family Doctors), or when they work in the same office or clinic together, a "group" or a "practice".