Final answer:
A participating physician is a doctor who agrees to accept an insurance company's pre-established fee as the maximum amount to be collected.
Step-by-step explanation:
A "participating physician" is a term commonly used in the context of health insurance and managed care plans. A participating physician is a healthcare provider, usually a medical doctor or doctor of osteopathic medicine, who has entered into an agreement with a health insurance plan or a managed care organization to provide medical services to the plan's members.
A doctor who agrees to accept an insurance company's pre-established fee as the maximum amount to be collected is called a participating physician.