I wish this were simple, but it is not. The American Board of Plastic Surgery, American Board of Otolaryngology, American Board of Orthopedics, etc. are so recognized. And there is a third problem which is the variability of surgeon experience and practice.
Some surgeons practice where operation X is common.
Others practice where operation X is uncommon. And usually the former will do better with operation X than the latter. That is simple. Well, some aspects of Plastic Surgery-2 are included in Otolaryngology, Oral Surgery, Ophthalmology, Orthopedics, etc. Tough to answer.