pre-authorization or pre-certification, as required by the plan or issuer that are no more restrictive than the predominant treatment limitations applied to substantially all medical and surgical benefits covered by the plan (or coverage). (3) Treatment defined (A) In general Except as provided in subparagraph (B), in this section, the term treatment includes patient and outpatient care and services performed to improve or restore body function (or performed to approximate a normal appearance), due to congenital anomaly or birth defect and shall include treatment to any and all missing or abnormal body parts, (including teeth, the oral cavity, and their associated structures) that would otherwise be provided under the plan or coverage for any other injury and sickness, including— (i) inpatient and outpatient care, reconstructive services and procedures, and complications thereof, including prosthetics and appliances