I did rural rotations in med school to see if I could survive exile in BF No Where and concluded that a city rat like me couldn't cut it. There's a reason why so many people like to live around so many people.
People (i.e. AAFP, STFM) don't talk about "Urban Family Medicine" anymore. Don't know why. But there are some places you can look to if you're interested in modeling your training experiences. I'd recommend reading academic medical education literature published by Ohio State Urban Track faculty, faculty from Columbia University in NYC, the Institute of Urban Family Health at Beth Isreal in NYC, and UCSF at San Francisco General.
I can't vouch for their residency programs... you'll have to make the decision if that's those are the programs you want. Most county hospitals have good urban underserved programs... but those tend to be opposed programs. If you're hard core about it, consider them. Or, you can check out the unopposed county programs. Contra Costa is a good one. JPS is a good one. When you shop around, ask about HIV experience. That's a good feather to have in your cap.
Did a little research myself back in the day. Found some stuff. I didn't do one of these "urban programs". Sounded more like a marketing ploy to me. Instead, I picked a residency that I liked and focused my electives/selectives and tailored my residency experiences to things I was interested in per below.
Good luck...
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http://www.aafp.org/online/en/home/policy/policies/u/urbaninnercity.html
An "Urban/Inner-City Training Program in Family Medicine" may be defined by any one of the following three criteria:
A program with at least 80% of training based at an inner-city location.
A program from which at least 50% of its graduates in the previous three years have chosen to practice in an inner-city Community Health Center (CHC), Federally Qualified Health Center (FQHC), or similar clinical setting serving low-income patients.
A program that includes all of the following components in addition to the longitudinal experience of clinical practice in the urban/inner-city environment:
A mission statement that includes a commitment to care of the urban underserved.
A Family Medicine Center located in and serving an urban/inner-city patient population;
Training to provide culturally effective community-responsive primary care;
At least one month or 100 hours (may be longitudinal) of clinical experience in an urban community health center, homeless shelter or similar facility;
At least one month or 100 hours (may be longitudinal) experience in an urban public health department setting;
At least two months clinical hands-on experience in the Emergency Department of an urban/inner-city Level II or higher trauma center;
At least one month or 100 hours (may be longitudinal) of clinical hands-on experience in an HIV/AIDS clinic or similar setting;
A required structured educational experience in occupational health;
A required structured educational experience in adolescent medicine;
A required structured educational experience in the care of patients with acute and chronic mental illness;
A required clinical hands-on experience in a substance abuse treatment facility or program;
The current federal definition for an urban/inner-city metropolitan area is one with a population of 500,000 persons or more. There may be many family medicine residency programs that can meet the elements of A. above in a metropolitan area of less than 500,000 persons. (2004)