My current experience in the midwest is that the Physician Loan program requires:
1. Credit score above 680
2. Training program contract listing your salary
3. Previous tax returns if you want to boost the pre-approval mortgage amount (necessary for high cost areas like Los Angeles, San Francisco, NYC, etc.)
The program boasts that you can put $0 down, requires no mortgage insurance (PMI), have up to 47% debt-to-income ratio and qualify, and does not count deferred student debt in calculating the amount of debt you have.
I'm getting 3.125% APY fixed for 7 years, then 23 years of variable where the capped rate is 7.125%. My training program is 3 years and I will likely have converted this house into a rental, refinanced on the rehabbed value (getting rid of that variable rate), and bought a second house nearby to repeat the process.