It depends a bit on exactly what you mean by socialized, but I have the Singaporean system in mind. (I was just quoting Cougher when using the term socialized.)
Singapore has some of the best healthcare outcomes in the world, and costs about half as much as a share of GDP per capita as the British NHS.
Where the American system seems to combine the worst of public and private healthcare, Singapore combines the best.
In the Singaporean system individuals use a health savings account to pay for small, routine health care costs. The insurance part of the system only kicks in for larger, costlier, uncertain items.
There's plenty of subsidies for poor people, too.
See eg https://www.nytimes.com/2019/04/22/upshot/singapore-health-s... for an American perspective. There's also plenty of easy to find material on the web.
I especially like that doctors usually have a list with price ranges for their most common items hanging out prominently. Very transparent.