The following loans are eligible to be included in a consolidation loan:

Federal Insured Student Loans (FISL)
Federal Stafford Loans
Federal PLUS Loans
Federal SLS
Health Professions Student Loans (HPSL)
including Loans for Disadvantaged Students (LDS)
Perkins Loans
Nursing School Loans
Federal Direct Subsidized and Unsubsidized Stafford Loans
Federal Direct PLUS Loans
Existing Consolidation Loans
Federal GradPLUS Loans