EXHIBIT 12
HCA INC.
COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
FOR THE QUARTERS AND SIX MONTHS JUNE 30, 2002 AND 2001
(DOLLARS IN MILLIONS)
<Table>
<Caption>
QUARTER SIX MONTHS
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2002 2001 2002 2001
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EARNINGS:
Income before minority interests and income taxes........... $ 623 $ 460 $1,284 $1,032
Fixed charges, excluding capitalized interest............... 137 168 286 337
----- ----- ------ ------
$ 760 $ 628 $1,570 $1,369
===== ===== ====== ======
FIXED CHARGES:
Interest charged to expense................................. $ 108 $ 139 $ 229 $ 281
Interest portion of rental expense and amortization of
deferred loan costs....................................... 29 29 57 56
----- ----- ------ ------
Fixed charges, excluding capitalized interest............... 137 168 286 337
Capitalized interest........................................ 10 3 13 7
----- ----- ------ ------
$ 147 $ 171 $ 299 $ 344
===== ===== ====== ======
Ratio of earnings to fixed charges.......................... 5.17 3.67 5.25 3.98
</Table>