Here are the number of active physicians in eight specialties, according to September data from KFF.
Emergency medicine: 64,239 physicians
Psychiatry: 58,540 physicians
Surgery: 56,400 physicians
Anesthesiology: 53,038 physicians
Radiology: 49,872 physicians
Cardiology: 34,312 physicians
Oncology: 22,990 physicians
Endocrinology, diabetes and metabolism: 8,842 physicians