EXHIBIT 12
HCA INC.
COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
FOR THE QUARTERS AND SIX MONTHS ENDED JUNE 30, 2004 AND 2003
(DOLLARS IN MILLIONS)
<Table>
<Caption>
QUARTER SIX MONTHS
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2004 2003 2004 2003
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EARNINGS:
Income before minority interests and income taxes........... $ 600 $ 437 $1,197 $1,241
Fixed charges, excluding capitalized interest............... 167 153 332 296
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$ 767 $ 590 $1,529 $1,537
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FIXED CHARGES:
Interest charged to expense................................. $ 136 $ 123 $ 271 $ 237
Interest portion of rental expense and amortization of
deferred loan costs....................................... 31 30 61 59
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Fixed charges, excluding capitalized interest............... 167 153 332 296
Capitalized interest........................................ 6 13 15 25
----- ----- ------ ------
$ 173 $ 166 $ 347 $ 321
===== ===== ====== ======
Ratio of earnings to fixed charges.......................... 4.43 3.55 4.40 4.79
</Table>