Dr Victor Ramirez has a picture of the bikini clad reality TV beauty on an advertisement in Mexicali - near the California border - along with a message saying "No arriesgue su belleza, ni su salud" which translates as "Don't risk your beauty or your health"(sic).
When questioned on the billboard by gossip websiteTMZ, Dr Ramirez said: "Obviously I did not speak to Kim Kardashian. I do not have her number."
'I'm not always confident'
Kim immediately put her lawyers on the case and they are said to be discussing their course of action.
Although Kim has admitted to trying Botox in the past, she previously said she would think carefully before having plastic surgery as women often go too far in their quest to retain a youthful appearance.
She said: "I don't worry about ageing. I might consider a 'lift' but women in Los Angles go too far. I don't want to end up with big puffy lips and a scary stretched-back face.
"I'm not always confident - of course I have hang-ups like everyone else. I've never been a big fan of my thighs, but I do love my stomach when it's in shape. I work out with my personal trainer, Gunnar Peterson, for an hour each day and do classes. But I enjoy running on the treadmill."
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