EXHIBIT 12
HCA INC.
COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
FOR THE QUARTERS AND NINE MONTHS ENDED SEPTEMBER 30, 2004 AND 2003
(DOLLARS IN MILLIONS)
<Table>
<Caption>
QUARTER NINE MONTHS
------------- ---------------
2004 2003 2004 2003
----- ----- ------ ------
EARNINGS:
Income before minority interests and income taxes........... $ 413 $ 532 $1,610 $1,773
Fixed charges, excluding capitalized interest............... 170 157 502 453
----- ----- ------ ------
$ 583 $ 689 $2,112 $2,226
===== ===== ====== ======
FIXED CHARGES:
Interest charged to expense................................. $ 138 $ 127 $ 409 $ 364
Interest portion of rental expense and amortization of
deferred loan costs....................................... 32 30 93 89
----- ----- ------ ------
Fixed charges, excluding capitalized interest............... 170 157 502 453
Capitalized interest........................................ 7 13 22 38
----- ----- ------ ------
$ 177 $ 170 $ 524 $ 491
===== ===== ====== ======
Ratio of earnings to fixed charges.......................... 3.30 4.06 4.03 4.54
</Table>