In what box on the W2 is FICA reported?

Question

In what box on the W2 is FICA reported?

Answer 1

FICA is box 4.

Medicare is box 6.

Answer 2

Boxes 4 and 6.

Social Security is box 4, and Medicare is box 6.  FICA is often used as a collective term for both Social Security and Medicare taxes.