In an identity theft case, How much money is stolen before it becomes federal?

Question

I need to find out when Identity theft becomes a US Federal Crime.

Answer 1

Transferring a stolen pin number or other protection method (passwords, etc) across state lines makes it a federal crime even without any money being taken.

Answer 2

It already is a federal crime.

Answer 3

There is no dollar amount involved to make it federal.  Instead, it is the use of federally insured banks, use of interstate electronic systems, use of a social security number, and such