Final answer:
Some managed care plans, including HMOs, PPOs, and EPOs, require preauthorization for medical services such as surgery, expensive medical tests, and medication therapy, while others may not. It depends on the specific managed care plan.
Step-by-step explanation:
The requirement for preauthorization of medical services such as surgery, expensive medical tests, and medication therapy may vary among managed care plans.
Some managed care plans, including HMOs, PPOs, and EPOs, do require preauthorization for these services, while others may not.
It depends on the specific managed care plan whether preauthorization is required or not.