Lawmakers on Capitol Hill are considering limiting employee health care flexible spending accounts.
    
The health care reform legislation could include a back-door tax hike.  Flexible spending accounts are currently tax free.
    
Workers put money into the accounts to pay for dental work, co-payments and some medications.
    
Currently, there is no cap on annual employee contributions, but proposed legislation would cap contributions at $2,500.
    
That would limit the employee income tax exemption, and result in a tax increase.
     
Lawmakers said this would raise more than $13 billion over the next ten years.