The term "primary care" is a broad one. Generally, it refers to the fields of family medicine, pediatrics, and ob/gyn. Generally, the specialties of family medicine and pediatrics are 3 year residencies. OB/gyn is usually 4. If you do fellowships, you can tack on a year or two, but most people don't.
There are many options available in primary care:
1. Most typically, the doctor works in a community setting and has clinic and inpatients. This applies to all of the fields mentioned above.
2. You can end up teaching, either in a university medical school setting, a university-based residency setting, or a community based residency setting.
Finally, you can end up "specializing" in primary care, which I guess is an oxymoron. But for example, in family medicine you can specialize in geriatrics, hospice, sports medicine, academic medicine, etc.
So where will you be in 10 years? Who knows? Any of the above and possibly more as things emerge in the next 10 years. Good luck on your journey!
Jim Henderson, MD of Medicalstudent.net