Hospital group stocks today faced intense sell-offs, leading to broad declines across the board. The primary pressure came from "rumors" circulating widely on social media and among life insurance agents.
These rumors concern changes in health insurance policy formats, shifting from the “all-inclusive” model to a “co-payment” system, raising investor worries about potential impacts on major revenue sources for private hospitals, which heavily rely on health insurance customers.
This issue immediately became a negative factor affecting investment sentiment amid questions about how much this health insurance structural change will affect future profitability.
A review of recent medical sector stock price movements on 12 Jan 2026 revealed widespread selling pressure throughout the sector, causing the group index to fall sharply.
The entire board turned "deep red," primarily due to concerns over health insurance trends, compounded by specific factors in certain stocks, such as large-volume transactions of BH shares at prices below previous trading levels.
As of 14:30, the top five hospital stocks with the largest declines were as follows:
The source of this panic stems from social media rumors that major insurance companies plan to "cease" selling all-inclusive health insurance to new customers, effective from 31 March 2026 onward.
The new policy format may switch to a co-payment model, with percentage shares of co-payments varying according to premium rates.
Market concerns focus on "revenue from insured patients," a vital lifeline for private hospitals. If insurance shifts to co-payment, patients might hesitate or reduce the frequency of seeking treatment due to out-of-pocket costs.
Data from the first nine months of 2026 show many hospitals have a very high proportion of revenue from insured patients, such as BDMS at 38%, THG at 32%, and BCH at 25%.
Therefore, any changes in insurance structures inevitably affect profit forecasts.
Analysts from Krungsri Securities publicly inquired with leading insurers (Krungthai-AXA, Allianz, Muang Thai Life) and found that all-inclusive health insurance is still being offered to new customers, with no clear termination plans as rumored for some companies.
However, in the short term, the news may accelerate decisions among those considering insurance to purchase all-inclusive policies sooner before any potential deadline.
Furthermore, analysts expect the medium- to long-term impact on hospital groups to be limited for three main reasons:
1. No retrospective effect on existing customers.
Under the new health insurance standards, existing policyholders maintain continuous coverage and can renew policies in all cases (except in cases of information concealment or fraud). Hence, the established customer base with purchasing power remains unaffected by these changes.
2. Opportunity to expand new markets.
Although switching to co-payment may seem restrictive, it lowers premium costs, potentially attracting new customers who previously could not afford all-inclusive insurance, thereby expanding the overall customer base.
3. Partnerships.
Large hospitals have strong alliances, such as BDMS's exclusive insurance partnerships with companies like Viriyah and Allianz, offering assured customer bases to hospitals.
Nonetheless, a "hold" (neutral) recommendation remains for the medical sector, expecting group net profit in Q4 2025 to rebound from the previous year due to revenue recovery, and projecting 6% net profit growth in 2026 driven by an aging society and expanding insured customer segments increasing service utilization.
Additionally, treatment intensity is likely to rise due to disease complexity among both Thai and foreign patients. Potential increases in social security treatment fees would also be an upside factor for group profitability.
Top stock picks are BDMS with a target price of 29 baht and BCH with a target price of 15.80 baht per share.
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