The NURSE Corps Loan Repayment Program is a program that supports registered nurses, advanced practice registered nurses and nurse faculty by paying up to 85% of their student dept. Check out this heat density map which shows the number of active NURSE Corps Loan Repayment sites as of 2017. Nurses that work at these sites are eligible to have some of their student loans forgiven. From the map we can see some highly concentrated areas in the Northeastern states.
Source: Health Resources and Services Administration (HRSA)
Data Warehouse. Accessed on 10/11/2017 https://datawarehouse.hrsa.gov/tools/DataPortalResults.aspx