<p>Undergrad - 4 or 5 years
Medical school 4 years</p>
<p>Internal Medicine, family practice or pediatrics residency 3 years
Plastics - 2 year fellowship after successful completion of a residency in Orthopedic surgery, ENT, or Urology (all 5 years) OR completion of a 7 year Neurosurgery residency.</p>
<p>So the difference is 4-6 years (from the AAMC’s Careers in Medicine page)</p>