The guilty verdicts are the first in the wide-ranging scandal that embroiled the country for months and culminated in Park's dismissal.
Kim Sang Man, who gave the former president the placenta injections, was fined 10 million won (HK$68,737) for faking medical records whenever he secretly treated her.
Another plastic surgeon, Kim Young Jae, was given an 18-month suspended prison sentence for perjury for telling a parliamentary hearing that he had not given Park cosmetic treatment, when he later admitted giving her botox injections.
Park was renowned for her meticulous attention to her appearance.
The court also sentenced Kim Young Jae's wife to a year in prison for bribing Park's top economic adviser in exchange for policy favors for her business.