Only 4% of illegal medical ads result in real penalties, data shows

"You can lose weight fast without even exercising."

Illegal and false medical advertisements making unverified claims are proliferating across mobile platforms, yet fewer than 5 percent of reported violations result in meaningful penalties such as fines or criminal referrals, according to data released Tuesday.

Enforcement standards also vary sharply by local government, with the majority of cases resolved through non-binding administrative guidance that carries no legal force.

Of 856 complaints filed over illegal medical advertising nationwide from 2021 through the first half of 2026, only 37 cases — 4.3 percent — led to substantive action such as fines or criminal referrals. The data were compiled from 16 cities and provinces by Democratic Party of Korea lawmaker Nam In-soon of the National Assembly's Health and Welfare Committee.

A total of 689 cases, or 80.5 percent of the total, were resolved through simple administrative guidance with no punitive effect.

When complaints about hospital signage and name-display violations are included, the overall tally rises to 1,252 complaints, of which only 113 — 9 percent — resulted in actual sanctions.

A review of the complaints reveals numerous clear-cut violations designed to mislead patients.

Common examples included advertisements promoting credentials with no legal basis — such as "certified obesity specialist," "disc treatment specialist oriental medicine doctor" and "zero pain" — as well as exaggerated claims that high-frequency thermal therapy devices and high-dose intravenous vitamins could destroy cancer cells.

In most cases, the relevant authorities closed the complaints without action or issued only administrative guidance.

Among all complaints combining medical advertising and signage violations, Sejong and Gangwon Province recorded a sanction rate of zero — with 51 and nine complaints respectively, neither resulted in a single substantive penalty.

Major cities including Incheon (1.2 percent), Gwangju (4.7 percent) and Seoul (5.3 percent) also posted single-digit enforcement rates.

By contrast, Jeju imposed sanctions in both of its two cases for a rate of 100 percent, while North Gyeongsang Province (93.8 percent), South Gyeongsang Province (44.0 percent) and South Chungcheong Province (35.1 percent) applied comparatively strict penalties, highlighting stark regional disparities.

In cases involving impersonation of medical specialists or misleading claims about qualifications, more than 86 percent ended with simple administrative guidance. Even for the same type of violation, outcomes ranged from criminal referral to administrative guidance depending on the local authority.

"When deceptive advertising that lures patients with false and exaggerated claims is met with only slap-on-the-wrist punishment, it sends the wrong message that breaking the law is actually worth it," Nam said. "To address the imbalance in enforcement standards across local governments and their tepid responses, it is urgent to reform the system — by standardizing sanction criteria and establishing a permanent monitoring framework."