One Medical Group has closed a fresh $40 million round of funding, the startup announced today.

One Medical operates a chain of high-end doctor’s offices that allow patients to book same-day appointments online, track their personal health between doctor visits, and get lab test results back sooner than usual by running the tests on site. One Medical charges a $200 annual fee for access to its doctors, and that’s on top of whatever you’re paying for insurance.

And as VentureBeat previously reported, One Medical has become a perk — sort of like a gym membership — for employees of several hot tech startups.

“We started One Medical to build a better primary care delivery model – one that uses technology to deliver higher-quality care and service more affordably,” said One Medical Group CEO and founder Tom Lee in a statement.

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The company said it plans to use the new capital to expand into new markets. One Medical currently has 27 offices across the country, including in San Francisco, Boston, Chicago, Los Angeles, and New York.

Redmile Group let the new round of funding, with participation from existing investors.

Founded in 2007, the San Francisco, Calif.-based startup has raised a total of $117 million in funding to date.

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