Recently, Greenwald was the guest of honor at a small luncheon hosted by one of her patients, the tech entrepreneur and philanthropist Gisel Kordestani, in Atherton, California, one of the wealthiest towns in the country. Her sparkling Jimmy Choo flats peeked out from under a long, rainbow-striped dress, and her language immediately signalled that she shares Silicon Valley's obsession with optimization and innovation—"perseveration on perfection," she calls it, a determination to bring the entrepreneurial mind-set into every aspect of one's life. The women at the lunch were not content to enjoy good health; they were looking for a way to level up. (The latest term for this is "healthmaxxing." At her practice, Greenwald decided that patients would never wait, that she would be available from 6 a.m. to 9 p.m., and that she would never have to cancel because she was delivering a baby. The office would provide spa-fluffy robes, heated towels, and premium teas. She would answer texts and calls at all hours, including on weekends, and would travel to patients' pool houses for a quick infection check or meet them on the tarmac when they flew, in a private jet, up from L.A. She tracks all of her patients' metrics: blood tests to check that hormones are balanced; Oura rings to show resting heart rates and sleep scores; glucose monitors to keep tabs on blood sugar; food-tracking apps for logging daily protein targets. She raised her prices a few times. Consultations became a thousand dollars, then two thousand. She decided to accept new members with tiered annual fees, starting at ten thousand dollars and exceeding thirty thousand for the most extensive care, which can involve assembling a specialized care team to monitor complex comorbidities. "I love being in concierge medicine, because practicing at the top 0.001 per cent—that's where innovation happens," Greenwald told me. "I get to sit around and think about these things." She went on, "I am always, like, 'What's next? What's better? Why don't we try this?' " She added, "But at some point the system needs to evolve so other people can access this kind of care." Midi Health, a virtual-care platform for women in menopause and perimenopause which was founded in 2021, offers the same sorts of hormone treatments that Greenwald does, including options for cancer patients, and it accepts insurance.



