EXHIBIT 12 HCA INC. COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES FOR THE QUARTERS MARCH 31, 2005 AND 2004 (DOLLARS IN MILLIONS) <Table> <Caption> QUARTER ----------- 2005 2004 ---- ---- EARNINGS: Income before minority interests and income taxes........... $703 $597 Fixed charges, excluding capitalized interest............... 196 165 ---- ---- $899 $762 ==== ==== FIXED CHARGES: Interest charged to expense................................. $164 $135 Interest portion of rental expense and amortization of deferred loan costs....................................... 32 30 ---- ---- Fixed charges, excluding capitalized interest............... 196 165 Capitalized interest........................................ 6 9 ---- ---- $202 $174 ==== ==== Ratio of earnings to fixed charges.......................... 4.44 4.38 </Table>